diff --git a/backend/internal/controller/oidc_controller.go b/backend/internal/controller/oidc_controller.go
index 7445c0b8..cbe46141 100644
--- a/backend/internal/controller/oidc_controller.go
+++ b/backend/internal/controller/oidc_controller.go
@@ -5,6 +5,7 @@ import (
 	"log/slog"
 	"net/http"
 	"net/url"
+	"strconv"
 	"strings"
 	"time"
 
@@ -357,6 +358,7 @@ func (oc *OidcController) getClientMetaDataHandler(c *gin.Context) {
 	clientDto := dto.OidcClientMetaDataDto{}
 	err = dto.MapStruct(client, &clientDto)
 	if err == nil {
+		clientDto.HasDarkLogo = client.HasDarkLogo()
 		c.JSON(http.StatusOK, clientDto)
 		return
 	}
@@ -419,6 +421,7 @@ func (oc *OidcController) listClientsHandler(c *gin.Context) {
 			_ = c.Error(err)
 			return
 		}
+		clientDto.HasDarkLogo = client.HasDarkLogo()
 		clientDto.AllowedUserGroupsCount, err = oc.oidcService.GetAllowedGroupsCountOfClient(c, client.ID)
 		if err != nil {
 			_ = c.Error(err)
@@ -539,10 +542,13 @@ func (oc *OidcController) createClientSecretHandler(c *gin.Context) {
 // @Produce image/jpeg
 // @Produce image/svg+xml
 // @Param id path string true "Client ID"
+// @Param light query boolean false "Light mode logo (true) or dark mode logo (false)"
 // @Success 200 {file} binary "Logo image"
 // @Router /api/oidc/clients/{id}/logo [get]
 func (oc *OidcController) getClientLogoHandler(c *gin.Context) {
-	imagePath, mimeType, err := oc.oidcService.GetClientLogo(c.Request.Context(), c.Param("id"))
+	lightLogo, _ := strconv.ParseBool(c.DefaultQuery("light", "true"))
+
+	imagePath, mimeType, err := oc.oidcService.GetClientLogo(c.Request.Context(), c.Param("id"), lightLogo)
 	if err != nil {
 		_ = c.Error(err)
 		return
@@ -561,6 +567,7 @@ func (oc *OidcController) getClientLogoHandler(c *gin.Context) {
 // @Accept multipart/form-data
 // @Param id path string true "Client ID"
 // @Param file formData file true "Logo image file (PNG, JPG, or SVG)"
+// @Param light query boolean false "Light mode logo (true) or dark mode logo (false)"
 // @Success 204 "No Content"
 // @Router /api/oidc/clients/{id}/logo [post]
 func (oc *OidcController) updateClientLogoHandler(c *gin.Context) {
@@ -570,13 +577,16 @@ func (oc *OidcController) updateClientLogoHandler(c *gin.Context) {
 		return
 	}
 
-	err = oc.oidcService.UpdateClientLogo(c.Request.Context(), c.Param("id"), file)
+	lightLogo, _ := strconv.ParseBool(c.DefaultQuery("light", "true"))
+
+	err = oc.oidcService.UpdateClientLogo(c.Request.Context(), c.Param("id"), file, lightLogo)
 	if err != nil {
 		_ = c.Error(err)
 		return
 	}
 
 	c.Status(http.StatusNoContent)
+
 }
 
 // deleteClientLogoHandler godoc
@@ -584,16 +594,26 @@ func (oc *OidcController) updateClientLogoHandler(c *gin.Context) {
 // @Description Delete the logo for an OIDC client
 // @Tags OIDC
 // @Param id path string true "Client ID"
+// @Param light query boolean false "Light mode logo (true) or dark mode logo (false)"
 // @Success 204 "No Content"
 // @Router /api/oidc/clients/{id}/logo [delete]
 func (oc *OidcController) deleteClientLogoHandler(c *gin.Context) {
-	err := oc.oidcService.DeleteClientLogo(c.Request.Context(), c.Param("id"))
+	var err error
+
+	lightLogo, _ := strconv.ParseBool(c.DefaultQuery("light", "true"))
+	if lightLogo {
+		err = oc.oidcService.DeleteClientLogo(c.Request.Context(), c.Param("id"))
+	} else {
+		err = oc.oidcService.DeleteClientDarkLogo(c.Request.Context(), c.Param("id"))
+	}
+
 	if err != nil {
 		_ = c.Error(err)
 		return
 	}
 
 	c.Status(http.StatusNoContent)
+
 }
 
 // updateAllowedUserGroupsHandler godoc
@@ -624,6 +644,7 @@ func (oc *OidcController) updateAllowedUserGroupsHandler(c *gin.Context) {
 		_ = c.Error(err)
 		return
 	}
+	oidcClientDto.HasDarkLogo = oidcClient.HasDarkLogo()
 
 	c.JSON(http.StatusOK, oidcClientDto)
 }
diff --git a/backend/internal/dto/oidc_dto.go b/backend/internal/dto/oidc_dto.go
index 110cc585..9f3239de 100644
--- a/backend/internal/dto/oidc_dto.go
+++ b/backend/internal/dto/oidc_dto.go
@@ -6,6 +6,7 @@ type OidcClientMetaDataDto struct {
 	ID                       string  `json:"id"`
 	Name                     string  `json:"name"`
 	HasLogo                  bool    `json:"hasLogo"`
+	HasDarkLogo              bool    `json:"hasDarkLogo"`
 	LaunchURL                *string `json:"launchURL"`
 	RequiresReauthentication bool    `json:"requiresReauthentication"`
 }
@@ -39,7 +40,9 @@ type OidcClientUpdateDto struct {
 	Credentials              OidcClientCredentialsDto `json:"credentials"`
 	LaunchURL                *string                  `json:"launchURL" binding:"omitempty,url"`
 	HasLogo                  bool                     `json:"hasLogo"`
+	HasDarkLogo              bool                     `json:"hasDarkLogo"`
 	LogoURL                  *string                  `json:"logoUrl"`
+	DarkLogoURL              *string                  `json:"darkLogoUrl"`
 }
 
 type OidcClientCreateDto struct {
diff --git a/backend/internal/model/oidc.go b/backend/internal/model/oidc.go
index 701d6e7a..e063ddb1 100644
--- a/backend/internal/model/oidc.go
+++ b/backend/internal/model/oidc.go
@@ -52,6 +52,7 @@ type OidcClient struct {
 	CallbackURLs             UrlList
 	LogoutCallbackURLs       UrlList
 	ImageType                *string
+	DarkImageType            *string
 	IsPublic                 bool
 	PkceEnabled              bool `filterable:"true"`
 	RequiresReauthentication bool `filterable:"true"`
@@ -68,6 +69,10 @@ func (c OidcClient) HasLogo() bool {
 	return c.ImageType != nil && *c.ImageType != ""
 }
 
+func (c OidcClient) HasDarkLogo() bool {
+	return c.DarkImageType != nil && *c.DarkImageType != ""
+}
+
 type OidcRefreshToken struct {
 	Base
 
diff --git a/backend/internal/service/oidc_service.go b/backend/internal/service/oidc_service.go
index a224a214..977b1fea 100644
--- a/backend/internal/service/oidc_service.go
+++ b/backend/internal/service/oidc_service.go
@@ -746,12 +746,19 @@ func (s *OidcService) CreateClient(ctx context.Context, input dto.OidcClientCrea
 	}
 
 	if input.LogoURL != nil {
-		err = s.downloadAndSaveLogoFromURL(ctx, tx, client.ID, *input.LogoURL)
+		err = s.downloadAndSaveLogoFromURL(ctx, tx, client.ID, *input.LogoURL, true)
 		if err != nil {
 			return model.OidcClient{}, fmt.Errorf("failed to download logo: %w", err)
 		}
 	}
 
+	if input.DarkLogoURL != nil {
+		err = s.downloadAndSaveLogoFromURL(ctx, tx, client.ID, *input.DarkLogoURL, false)
+		if err != nil {
+			return model.OidcClient{}, fmt.Errorf("failed to download dark logo: %w", err)
+		}
+	}
+
 	err = tx.Commit().Error
 	if err != nil {
 		return model.OidcClient{}, err
@@ -778,12 +785,19 @@ func (s *OidcService) UpdateClient(ctx context.Context, clientID string, input d
 	}
 
 	if input.LogoURL != nil {
-		err := s.downloadAndSaveLogoFromURL(ctx, tx, client.ID, *input.LogoURL)
+		err := s.downloadAndSaveLogoFromURL(ctx, tx, client.ID, *input.LogoURL, true)
 		if err != nil {
 			return model.OidcClient{}, fmt.Errorf("failed to download logo: %w", err)
 		}
 	}
 
+	if input.DarkLogoURL != nil {
+		err := s.downloadAndSaveLogoFromURL(ctx, tx, client.ID, *input.DarkLogoURL, false)
+		if err != nil {
+			return model.OidcClient{}, fmt.Errorf("failed to download dark logo: %w", err)
+		}
+	}
+
 	if err := tx.Commit().Error; err != nil {
 		return model.OidcClient{}, err
 	}
@@ -870,7 +884,7 @@ func (s *OidcService) CreateClientSecret(ctx context.Context, clientID string) (
 	return clientSecret, nil
 }
 
-func (s *OidcService) GetClientLogo(ctx context.Context, clientID string) (string, string, error) {
+func (s *OidcService) GetClientLogo(ctx context.Context, clientID string, light bool) (string, string, error) {
 	var client model.OidcClient
 	err := s.db.
 		WithContext(ctx).
@@ -880,23 +894,38 @@ func (s *OidcService) GetClientLogo(ctx context.Context, clientID string) (strin
 		return "", "", err
 	}
 
-	if client.ImageType == nil {
+	var imagePath, mimeType string
+
+	switch {
+	case !light && client.DarkImageType != nil:
+		// Dark logo if requested and exists
+		imagePath = common.EnvConfig.UploadPath + "/oidc-client-images/" + client.ID + "-dark." + *client.DarkImageType
+		mimeType = utils.GetImageMimeType(*client.DarkImageType)
+
+	case client.ImageType != nil:
+		// Light logo if requested or no dark logo is available
+		imagePath = common.EnvConfig.UploadPath + "/oidc-client-images/" + client.ID + "." + *client.ImageType
+		mimeType = utils.GetImageMimeType(*client.ImageType)
+
+	default:
 		return "", "", errors.New("image not found")
 	}
 
-	imagePath := common.EnvConfig.UploadPath + "/oidc-client-images/" + client.ID + "." + *client.ImageType
-	mimeType := utils.GetImageMimeType(*client.ImageType)
-
 	return imagePath, mimeType, nil
 }
 
-func (s *OidcService) UpdateClientLogo(ctx context.Context, clientID string, file *multipart.FileHeader) error {
+func (s *OidcService) UpdateClientLogo(ctx context.Context, clientID string, file *multipart.FileHeader, light bool) error {
 	fileType := strings.ToLower(utils.GetFileExtension(file.Filename))
 	if mimeType := utils.GetImageMimeType(fileType); mimeType == "" {
 		return &common.FileTypeNotSupportedError{}
 	}
 
-	imagePath := common.EnvConfig.UploadPath + "/oidc-client-images/" + clientID + "." + fileType
+	var darkSuffix string
+	if !light {
+		darkSuffix = "-dark"
+	}
+
+	imagePath := common.EnvConfig.UploadPath + "/oidc-client-images/" + clientID + darkSuffix + "." + fileType
 	err := utils.SaveFile(file, imagePath)
 	if err != nil {
 		return err
@@ -904,7 +933,7 @@ func (s *OidcService) UpdateClientLogo(ctx context.Context, clientID string, fil
 
 	tx := s.db.Begin()
 
-	err = s.updateClientLogoType(ctx, tx, clientID, fileType)
+	err = s.updateClientLogoType(ctx, tx, clientID, fileType, light)
 	if err != nil {
 		tx.Rollback()
 		return err
@@ -956,6 +985,49 @@ func (s *OidcService) DeleteClientLogo(ctx context.Context, clientID string) err
 	return nil
 }
 
+func (s *OidcService) DeleteClientDarkLogo(ctx context.Context, clientID string) error {
+	tx := s.db.Begin()
+	defer func() {
+		tx.Rollback()
+	}()
+
+	var client model.OidcClient
+	err := tx.
+		WithContext(ctx).
+		First(&client, "id = ?", clientID).
+		Error
+	if err != nil {
+		return err
+	}
+
+	if client.DarkImageType == nil {
+		return errors.New("image not found")
+	}
+
+	oldImageType := *client.DarkImageType
+	client.DarkImageType = nil
+
+	err = tx.
+		WithContext(ctx).
+		Save(&client).
+		Error
+	if err != nil {
+		return err
+	}
+
+	imagePath := common.EnvConfig.UploadPath + "/oidc-client-images/" + client.ID + "-dark." + oldImageType
+	if err := os.Remove(imagePath); err != nil {
+		return err
+	}
+
+	err = tx.Commit().Error
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
 func (s *OidcService) UpdateAllowedUserGroups(ctx context.Context, id string, input dto.OidcUpdateAllowedUserGroupsDto) (client model.OidcClient, err error) {
 	tx := s.db.Begin()
 	defer func() {
@@ -1329,9 +1401,10 @@ func (s *OidcService) GetDeviceCodeInfo(ctx context.Context, userCode string, us
 
 	return &dto.DeviceCodeInfoDto{
 		Client: dto.OidcClientMetaDataDto{
-			ID:      deviceAuth.Client.ID,
-			Name:    deviceAuth.Client.Name,
-			HasLogo: deviceAuth.Client.HasLogo(),
+			ID:          deviceAuth.Client.ID,
+			Name:        deviceAuth.Client.Name,
+			HasLogo:     deviceAuth.Client.HasLogo(),
+			HasDarkLogo: deviceAuth.Client.HasDarkLogo(),
 		},
 		Scope:                 deviceAuth.Scope,
 		AuthorizationRequired: !hasAuthorizedClient,
@@ -1463,10 +1536,11 @@ func (s *OidcService) ListAccessibleOidcClients(ctx context.Context, userID stri
 		}
 		dtos[i] = dto.AccessibleOidcClientDto{
 			OidcClientMetaDataDto: dto.OidcClientMetaDataDto{
-				ID:        client.ID,
-				Name:      client.Name,
-				LaunchURL: client.LaunchURL,
-				HasLogo:   client.HasLogo(),
+				ID:          client.ID,
+				Name:        client.Name,
+				LaunchURL:   client.LaunchURL,
+				HasLogo:     client.HasLogo(),
+				HasDarkLogo: client.HasDarkLogo(),
 			},
 			LastUsedAt: lastUsedAt,
 		}
@@ -1888,7 +1962,7 @@ func (s *OidcService) IsClientAccessibleToUser(ctx context.Context, clientID str
 	return s.IsUserGroupAllowedToAuthorize(user, client), nil
 }
 
-func (s *OidcService) downloadAndSaveLogoFromURL(parentCtx context.Context, tx *gorm.DB, clientID string, raw string) error {
+func (s *OidcService) downloadAndSaveLogoFromURL(parentCtx context.Context, tx *gorm.DB, clientID string, raw string, light bool) error {
 	u, err := url.Parse(raw)
 	if err != nil {
 		return err
@@ -1949,31 +2023,51 @@ func (s *OidcService) downloadAndSaveLogoFromURL(parentCtx context.Context, tx *
 		return err
 	}
 
-	imagePath := filepath.Join(folderPath, clientID+"."+ext)
+	var darkSuffix string
+	if !light {
+		darkSuffix = "-dark"
+	}
+
+	imagePath := filepath.Join(folderPath, clientID+darkSuffix+"."+ext)
 	err = utils.SaveFileStream(io.LimitReader(resp.Body, maxLogoSize+1), imagePath)
 	if err != nil {
 		return err
 	}
 
-	if err := s.updateClientLogoType(ctx, tx, clientID, ext); err != nil {
+	if err := s.updateClientLogoType(ctx, tx, clientID, ext, light); err != nil {
 		return err
 	}
 
 	return nil
 }
 
-func (s *OidcService) updateClientLogoType(ctx context.Context, tx *gorm.DB, clientID, ext string) error {
+func (s *OidcService) updateClientLogoType(ctx context.Context, tx *gorm.DB, clientID, ext string, light bool) error {
 	uploadsDir := common.EnvConfig.UploadPath + "/oidc-client-images"
 
+	var darkSuffix string
+	if !light {
+		darkSuffix = "-dark"
+	}
+
 	var client model.OidcClient
 	if err := tx.WithContext(ctx).First(&client, "id = ?", clientID).Error; err != nil {
 		return err
 	}
 	if client.ImageType != nil && *client.ImageType != ext {
-		old := fmt.Sprintf("%s/%s.%s", uploadsDir, client.ID, *client.ImageType)
+		old := fmt.Sprintf("%s/%s%s.%s", uploadsDir, client.ID, darkSuffix, *client.ImageType)
 		_ = os.Remove(old)
 	}
-	client.ImageType = &ext
-	return tx.WithContext(ctx).Save(&client).Error
 
+	var column string
+	if light {
+		column = "image_type"
+	} else {
+		column = "dark_image_type"
+	}
+
+	return tx.WithContext(ctx).
+		Model(&model.OidcClient{}).
+		Where("id = ?", clientID).
+		Update(column, ext).
+		Error
 }
diff --git a/backend/resources/migrations/postgres/20251018000000_add_dark_logo.down.sql b/backend/resources/migrations/postgres/20251018000000_add_dark_logo.down.sql
new file mode 100644
index 00000000..76e99a76
--- /dev/null
+++ b/backend/resources/migrations/postgres/20251018000000_add_dark_logo.down.sql
@@ -0,0 +1 @@
+ALTER TABLE oidc_clients DROP COLUMN dark_image_type;
diff --git a/backend/resources/migrations/postgres/20251018000000_add_dark_logo.up.sql b/backend/resources/migrations/postgres/20251018000000_add_dark_logo.up.sql
new file mode 100644
index 00000000..1b67e37a
--- /dev/null
+++ b/backend/resources/migrations/postgres/20251018000000_add_dark_logo.up.sql
@@ -0,0 +1 @@
+ALTER TABLE oidc_clients ADD COLUMN dark_image_type TEXT;
diff --git a/backend/resources/migrations/sqlite/20251018000000_add_dark_logo.down.sql b/backend/resources/migrations/sqlite/20251018000000_add_dark_logo.down.sql
new file mode 100644
index 00000000..07b8ef59
--- /dev/null
+++ b/backend/resources/migrations/sqlite/20251018000000_add_dark_logo.down.sql
@@ -0,0 +1,5 @@
+PRAGMA foreign_keys=OFF;
+BEGIN;
+ALTER TABLE oidc_clients DROP COLUMN dark_image_type;
+COMMIT;
+PRAGMA foreign_keys=ON;
diff --git a/backend/resources/migrations/sqlite/20251018000000_add_dark_logo.up.sql b/backend/resources/migrations/sqlite/20251018000000_add_dark_logo.up.sql
new file mode 100644
index 00000000..1bc15456
--- /dev/null
+++ b/backend/resources/migrations/sqlite/20251018000000_add_dark_logo.up.sql
@@ -0,0 +1,5 @@
+PRAGMA foreign_keys=OFF;
+BEGIN;
+ALTER TABLE oidc_clients ADD COLUMN dark_image_type TEXT;
+COMMIT;
+PRAGMA foreign_keys=ON;
diff --git a/frontend/src/lib/components/form/url-file-input.svelte b/frontend/src/lib/components/form/url-file-input.svelte
index 05aed37b..9d625361 100644
--- a/frontend/src/lib/components/form/url-file-input.svelte
+++ b/frontend/src/lib/components/form/url-file-input.svelte
@@ -12,11 +12,13 @@
 	let {
 		label,
 		accept,
-		onchange
+		onchange,
+		id = 'file-input'
 	}: {
 		label: string;
 		accept?: string;
 		onchange: (file: File | string | null) => void;
+		id?: string;
 	} = $props();
 
 	let url = $state('');
@@ -47,7 +49,7 @@
 
 <div class="flex">
 	<FileInput
-		id="logo"
+		{id}
 		variant="secondary"
 		{accept}
 		onchange={handleFileChange}
@@ -64,9 +66,9 @@
 			<LucideChevronDown class="size-4" /></Popover.Trigger
 		>
 		<Popover.Content class="w-80">
-			<Label for="file-url" class="text-xs">URL</Label>
+			<Label for="{id}-url" class="text-xs">URL</Label>
 			<Input
-				id="file-url"
+				id="{id}-url"
 				placeholder=""
 				value={url}
 				oninput={(e) => (url = e.currentTarget.value)}
diff --git a/frontend/src/lib/services/oidc-service.ts b/frontend/src/lib/services/oidc-service.ts
index 7918155b..2563f2ee 100644
--- a/frontend/src/lib/services/oidc-service.ts
+++ b/frontend/src/lib/services/oidc-service.ts
@@ -68,25 +68,31 @@ class OidcService extends APIService {
 	updateClient = async (id: string, client: OidcClientUpdate) =>
 		(await this.api.put(`/oidc/clients/${id}`, client)).data as OidcClient;
 
-	updateClientLogo = async (client: OidcClient, image: File | null) => {
-		if (client.hasLogo && !image) {
-			await this.removeClientLogo(client.id);
+	updateClientLogo = async (client: OidcClient, image: File | null, light: boolean = true) => {
+		const hasLogo = light ? client.hasLogo : client.hasDarkLogo;
+
+		if (hasLogo && !image) {
+			await this.removeClientLogo(client.id, light);
 			return;
 		}
-		if (!client.hasLogo && !image) {
+		if (!hasLogo && !image) {
 			return;
 		}
 
 		const formData = new FormData();
 		formData.append('file', image!);
 
-		await this.api.post(`/oidc/clients/${client.id}/logo`, formData);
-		cachedOidcClientLogo.bustCache(client.id);
+		await this.api.post(`/oidc/clients/${client.id}/logo`, formData, {
+			params: { light }
+		});
+		cachedOidcClientLogo.bustCache(client.id, light);
 	};
 
-	removeClientLogo = async (id: string) => {
-		await this.api.delete(`/oidc/clients/${id}/logo`);
-		cachedOidcClientLogo.bustCache(id);
+	removeClientLogo = async (id: string, light: boolean = true) => {
+		await this.api.delete(`/oidc/clients/${id}/logo`, {
+			params: { light }
+		});
+		cachedOidcClientLogo.bustCache(id, light);
 	};
 
 	createClientSecret = async (id: string) =>
diff --git a/frontend/src/lib/types/oidc.type.ts b/frontend/src/lib/types/oidc.type.ts
index 18087d88..9c926fbb 100644
--- a/frontend/src/lib/types/oidc.type.ts
+++ b/frontend/src/lib/types/oidc.type.ts
@@ -4,6 +4,7 @@ export type OidcClientMetaData = {
 	id: string;
 	name: string;
 	hasLogo: boolean;
+	hasDarkLogo: boolean;
 	requiresReauthentication: boolean;
 	launchURL?: string;
 };
@@ -37,17 +38,20 @@ export type OidcClientWithAllowedUserGroupsCount = OidcClient & {
 	allowedUserGroupsCount: number;
 };
 
-export type OidcClientUpdate = Omit<OidcClient, 'id' | 'logoURL' | 'hasLogo'>;
+export type OidcClientUpdate = Omit<OidcClient, 'id' | 'logoURL' | 'hasLogo' | 'hasDarkLogo'>;
 export type OidcClientCreate = OidcClientUpdate & {
 	id?: string;
 };
 export type OidcClientUpdateWithLogo = OidcClientUpdate & {
 	logo: File | null | undefined;
+	darkLogo: File | null | undefined;
 };
 
 export type OidcClientCreateWithLogo = OidcClientCreate & {
 	logo?: File | null;
 	logoUrl?: string;
+	darkLogo?: File | null;
+	darkLogoUrl?: string;
 };
 
 export type OidcDeviceCodeInfo = {
diff --git a/frontend/src/lib/utils/cached-image-util.ts b/frontend/src/lib/utils/cached-image-util.ts
index b151f974..05c69a91 100644
--- a/frontend/src/lib/utils/cached-image-util.ts
+++ b/frontend/src/lib/utils/cached-image-util.ts
@@ -9,73 +9,85 @@ type CachableImage = {
 
 export const cachedApplicationLogo: CachableImage = {
 	getUrl: (light = true) => {
-		let url = '/api/application-images/logo';
-		if (!light) {
-			url += '?light=false';
-		}
+		const url = new URL('/api/application-images/logo', window.location.origin);
+		if (!light) url.searchParams.set('light', 'false');
 		return getCachedImageUrl(url);
 	},
 	bustCache: (light = true) => {
-		let url = '/api/application-images/logo';
-		if (!light) {
-			url += '?light=false';
-		}
+		const url = new URL('/api/application-images/logo', window.location.origin);
+		if (!light) url.searchParams.set('light', 'false');
 		bustImageCache(url);
 	}
 };
 
 export const cachedBackgroundImage: CachableImage = {
-	getUrl: () => getCachedImageUrl('/api/application-images/background'),
-	bustCache: () => bustImageCache('/api/application-images/background')
+	getUrl: () =>
+		getCachedImageUrl(new URL('/api/application-images/background', window.location.origin)),
+	bustCache: () =>
+		bustImageCache(new URL('/api/application-images/background', window.location.origin))
 };
 
 export const cachedProfilePicture: CachableImage = {
 	getUrl: (userId: string) => {
-		const url = `/api/users/${userId}/profile-picture.png`;
+		const url = new URL(`/api/users/${userId}/profile-picture.png`, window.location.origin);
 		return getCachedImageUrl(url);
 	},
 	bustCache: (userId: string) => {
-		const url = `/api/users/${userId}/profile-picture.png`;
+		const url = new URL(`/api/users/${userId}/profile-picture.png`, window.location.origin);
 		bustImageCache(url);
 	}
 };
 
 export const cachedOidcClientLogo: CachableImage = {
-	getUrl: (clientId: string) => {
-		const url = `/api/oidc/clients/${clientId}/logo`;
+	getUrl: (clientId: string, light = true) => {
+		const url = new URL(`/api/oidc/clients/${clientId}/logo`, window.location.origin);
+		if (!light) url.searchParams.set('light', 'false');
 		return getCachedImageUrl(url);
 	},
-	bustCache: (clientId: string) => {
-		const url = `/api/oidc/clients/${clientId}/logo`;
+	bustCache: (clientId: string, light = true) => {
+		const url = new URL(`/api/oidc/clients/${clientId}/logo`, window.location.origin);
+		if (!light) url.searchParams.set('light', 'false');
 		bustImageCache(url);
 	}
 };
 
-function getCachedImageUrl(url: string) {
-	const skipCacheUntil = getSkipCacheUntil(url);
+function getCachedImageUrl(url: URL) {
+	const baseKey = normalizeUrlForKey(url);
+	const skipCacheUntil = getSkipCacheUntil(baseKey);
 	const skipCache = skipCacheUntil > Date.now();
+
+	const finalUrl = new URL(url.toString());
 	if (skipCache) {
-		const skipCacheParam = new URLSearchParams();
-		skipCacheParam.append('skip-cache', skipCacheUntil.toString());
-		url += '?' + skipCacheParam.toString();
+		finalUrl.searchParams.set('skip-cache', skipCacheUntil.toString());
 	}
 
-	return url.toString();
+	return finalUrl.pathname + (finalUrl.search ? `?${finalUrl.searchParams.toString()}` : '');
 }
 
-function bustImageCache(url: string) {
-	const skipCacheUntil: SkipCacheUntil = JSON.parse(
-		localStorage.getItem('skip-cache-until') ?? '{}'
-	);
-	skipCacheUntil[hashKey(url)] = Date.now() + 1000 * 60 * 15; // 15 minutes
-	localStorage.setItem('skip-cache-until', JSON.stringify(skipCacheUntil));
+function bustImageCache(url: URL) {
+	const key = normalizeUrlForKey(url);
+	const expiresAt = Date.now() + 1000 * 60 * 15;
+
+	const store: SkipCacheUntil = JSON.parse(localStorage.getItem('skip-cache-until') ?? '{}');
+	store[key] = expiresAt;
+	localStorage.setItem('skip-cache-until', JSON.stringify(store));
 }
 
-function getSkipCacheUntil(url: string) {
-	const skipCacheUntil: SkipCacheUntil = JSON.parse(
-		localStorage.getItem('skip-cache-until') ?? '{}'
+function getSkipCacheUntil(key: string): number {
+	const store: SkipCacheUntil = JSON.parse(localStorage.getItem('skip-cache-until') ?? '{}');
+	return store[key] ?? 0;
+}
+
+// Removes transient params and normalizes query order before hashing
+function normalizeUrlForKey(url: URL) {
+	const u = new URL(url.toString());
+	u.searchParams.delete('skip-cache');
+
+	const sortedParams = new URLSearchParams(
+		[...u.searchParams.entries()].sort(([a], [b]) => a.localeCompare(b))
 	);
-	return skipCacheUntil[hashKey(url)] ?? 0;
+	const normalized = u.pathname + (sortedParams.toString() ? `?${sortedParams.toString()}` : '');
+	return hashKey(normalized);
 }
 
 function hashKey(key: string): string {
@@ -83,7 +95,7 @@ function hashKey(key: string): string {
 	for (let i = 0; i < key.length; i++) {
 		const char = key.charCodeAt(i);
 		hash = (hash << 5) - hash + char;
-		hash = hash & hash;
+		hash |= 0;
 	}
 	return Math.abs(hash).toString(36);
 }
diff --git a/frontend/src/routes/settings/admin/application-configuration/application-image.svelte b/frontend/src/routes/settings/admin/application-configuration/application-image.svelte
index a7b050ef..86c0e1ed 100644
--- a/frontend/src/routes/settings/admin/application-configuration/application-image.svelte
+++ b/frontend/src/routes/settings/admin/application-configuration/application-image.svelte
@@ -41,8 +41,8 @@
 		<div
 			class={{
 				'group relative flex items-center rounded': true,
-				'bg-[#F1F1F5]': forceColorScheme === 'light',
-				'bg-[#27272A]': forceColorScheme === 'dark',
+				'bg-[#F5F5F5]': forceColorScheme === 'light',
+				'bg-[#262626]': forceColorScheme === 'dark',
 				'bg-muted': !forceColorScheme
 			}}
 		>
diff --git a/frontend/src/routes/settings/admin/oidc-clients/[id]/+page.svelte b/frontend/src/routes/settings/admin/oidc-clients/[id]/+page.svelte
index 737133d2..a90bafab 100644
--- a/frontend/src/routes/settings/admin/oidc-clients/[id]/+page.svelte
+++ b/frontend/src/routes/settings/admin/oidc-clients/[id]/+page.svelte
@@ -47,7 +47,12 @@
 		const dataPromise = oidcService.updateClient(client.id, updatedClient);
 		const imagePromise =
 			updatedClient.logo !== undefined
-				? oidcService.updateClientLogo(client, updatedClient.logo)
+				? oidcService.updateClientLogo(client, updatedClient.logo, true)
+				: Promise.resolve();
+
+		const darkImagePromise =
+			updatedClient.darkLogo !== undefined
+				? oidcService.updateClientLogo(client, updatedClient.darkLogo, false)
 				: Promise.resolve();
 
 		client.isPublic = updatedClient.isPublic;
@@ -56,8 +61,15 @@
 			? m.enabled()
 			: m.disabled();
 
-		await Promise.all([dataPromise, imagePromise])
+		await Promise.all([dataPromise, imagePromise, darkImagePromise])
 			.then(() => {
+				// Update the hasLogo and hasDarkLogo flags after successful upload
+				if (updatedClient.logo !== undefined) {
+					client.hasLogo = updatedClient.logo !== null || !!updatedClient.logoUrl;
+				}
+				if (updatedClient.darkLogo !== undefined) {
+					client.hasDarkLogo = updatedClient.darkLogo !== null || !!updatedClient.darkLogoUrl;
+				}
 				toast.success(m.oidc_client_updated_successfully());
 			})
 			.catch((e) => {
diff --git a/frontend/src/routes/settings/admin/oidc-clients/oidc-client-form.svelte b/frontend/src/routes/settings/admin/oidc-clients/oidc-client-form.svelte
index e5c2dd69..904e1314 100644
--- a/frontend/src/routes/settings/admin/oidc-clients/oidc-client-form.svelte
+++ b/frontend/src/routes/settings/admin/oidc-clients/oidc-client-form.svelte
@@ -2,6 +2,7 @@
 	import FormInput from '$lib/components/form/form-input.svelte';
 	import SwitchWithLabel from '$lib/components/form/switch-with-label.svelte';
 	import { Button } from '$lib/components/ui/button';
+	import * as Tabs from '$lib/components/ui/tabs';
 	import { m } from '$lib/paraglide/messages';
 	import type {
 		OidcClient,
@@ -13,7 +14,7 @@
 	import { createForm } from '$lib/utils/form-util';
 	import { cn } from '$lib/utils/style';
 	import { callbackUrlSchema, emptyToUndefined, optionalUrl } from '$lib/utils/zod-util';
-	import { LucideChevronDown } from '@lucide/svelte';
+	import { LucideChevronDown, LucideMoon, LucideSun } from '@lucide/svelte';
 	import { slide } from 'svelte/transition';
 	import { z } from 'zod/v4';
 	import FederatedIdentitiesInput from './federated-identities-input.svelte';
@@ -32,9 +33,13 @@
 	let isLoading = $state(false);
 	let showAdvancedOptions = $state(false);
 	let logo = $state<File | null | undefined>();
+	let darkLogo = $state<File | null | undefined>();
 	let logoDataURL: string | null = $state(
 		existingClient?.hasLogo ? cachedOidcClientLogo.getUrl(existingClient!.id) : null
 	);
+	let darkLogoDataURL: string | null = $state(
+		existingClient?.hasDarkLogo ? cachedOidcClientLogo.getUrl(existingClient!.id, false) : null
+	);
 
 	const client = {
 		id: '',
@@ -48,7 +53,8 @@
 		credentials: {
 			federatedIdentities: existingClient?.credentials?.federatedIdentities || []
 		},
-		logoUrl: ''
+		logoUrl: '',
+		darkLogoUrl: ''
 	};
 
 	const formSchema = z.object({
@@ -70,6 +76,7 @@
 		requiresReauthentication: z.boolean(),
 		launchURL: optionalUrl,
 		logoUrl: optionalUrl,
+		darkLogoUrl: optionalUrl,
 		credentials: z.object({
 			federatedIdentities: z.array(
 				z.object({
@@ -92,37 +99,63 @@
 
 		const success = await callback({
 			...data,
-			logo: $inputs.logoUrl?.value ? null : logo,
-			logoUrl: $inputs.logoUrl?.value
+			logo: $inputs.logoUrl?.value ? undefined : logo,
+			logoUrl: $inputs.logoUrl?.value,
+			darkLogo: $inputs.darkLogoUrl?.value ? undefined : darkLogo,
+			darkLogoUrl: $inputs.darkLogoUrl?.value
 		});
 
 		const hasLogo = logo != null || !!$inputs.logoUrl?.value;
-		if (success && existingClient && hasLogo) {
-			logoDataURL = cachedOidcClientLogo.getUrl(existingClient.id);
+		const hasDarkLogo = darkLogo != null || !!$inputs.darkLogoUrl?.value;
+		if (success && existingClient) {
+			if (hasLogo) {
+				logoDataURL = cachedOidcClientLogo.getUrl(existingClient.id);
+			}
+			if (hasDarkLogo) {
+				darkLogoDataURL = cachedOidcClientLogo.getUrl(existingClient.id, false);
+			}
 		}
 
 		if (success && !existingClient) form.reset();
 		isLoading = false;
 	}
 
-	function onLogoChange(input: File | string | null) {
+	function onLogoChange(input: File | string | null, light: boolean = true) {
 		if (input == null) return;
 
+		const logoUrlInput = light ? $inputs.logoUrl : $inputs.darkLogoUrl;
+
 		if (typeof input === 'string') {
-			logo = null;
-			logoDataURL = input || null;
-			$inputs.logoUrl!.value = input;
+			if (light) {
+				logo = null;
+				logoDataURL = input || null;
+			} else {
+				darkLogo = null;
+				darkLogoDataURL = input || null;
+			}
+			logoUrlInput!.value = input;
 		} else {
-			logo = input;
-			$inputs.logoUrl && ($inputs.logoUrl.value = '');
-			logoDataURL = URL.createObjectURL(input);
+			if (light) {
+				logo = input;
+				logoDataURL = URL.createObjectURL(input);
+			} else {
+				darkLogo = input;
+				darkLogoDataURL = URL.createObjectURL(input);
+			}
+			logoUrlInput && (logoUrlInput.value = '');
 		}
 	}
 
-	function resetLogo() {
-		logo = null;
-		logoDataURL = null;
-		$inputs.logoUrl && ($inputs.logoUrl.value = '');
+	function resetLogo(light: boolean = true) {
+		if (light) {
+			logo = null;
+			logoDataURL = null;
+			$inputs.logoUrl && ($inputs.logoUrl.value = '');
+		} else {
+			darkLogo = null;
+			darkLogoDataURL = null;
+			$inputs.darkLogoUrl && ($inputs.darkLogoUrl.value = '');
+		}
 	}
 
 	function getFederatedIdentityErrors(errors: z.ZodError<any> | undefined) {
@@ -182,13 +215,49 @@
 			bind:checked={$inputs.requiresReauthentication.value}
 		/>
 	</div>
-	<div class="mt-7">
-		<OidcClientImageInput
-			{logoDataURL}
-			{resetLogo}
-			clientName={$inputs.name.value}
-			{onLogoChange}
-		/>
+	<div class="mt-7 w-full md:w-1/2">
+		<Tabs.Root value="light-logo">
+			<Tabs.Content value="light-logo">
+				<OidcClientImageInput
+					{logoDataURL}
+					resetLogo={() => resetLogo(true)}
+					clientName={$inputs.name.value}
+					light={true}
+					onLogoChange={(input) => onLogoChange(input, true)}
+				>
+					{#snippet tabTriggers()}
+						<Tabs.List class="grid h-9 w-full grid-cols-2">
+							<Tabs.Trigger value="light-logo" class="px-3">
+								<LucideSun class="size-4" />
+							</Tabs.Trigger>
+							<Tabs.Trigger value="dark-logo" class="px-3">
+								<LucideMoon class="size-4" />
+							</Tabs.Trigger>
+						</Tabs.List>
+					{/snippet}
+				</OidcClientImageInput>
+			</Tabs.Content>
+			<Tabs.Content value="dark-logo">
+				<OidcClientImageInput
+					light={false}
+					logoDataURL={darkLogoDataURL}
+					resetLogo={() => resetLogo(false)}
+					clientName={$inputs.name.value}
+					onLogoChange={(input) => onLogoChange(input, false)}
+				>
+					{#snippet tabTriggers()}
+						<Tabs.List class="grid h-9 w-full grid-cols-2">
+							<Tabs.Trigger value="light-logo" class="px-3">
+								<LucideSun class="size-4" />
+							</Tabs.Trigger>
+							<Tabs.Trigger value="dark-logo" class="px-3">
+								<LucideMoon class="size-4" />
+							</Tabs.Trigger>
+						</Tabs.List>
+					{/snippet}
+				</OidcClientImageInput>
+			</Tabs.Content>
+		</Tabs.Root>
 	</div>
 
 	{#if showAdvancedOptions}
diff --git a/frontend/src/routes/settings/admin/oidc-clients/oidc-client-image-input.svelte b/frontend/src/routes/settings/admin/oidc-clients/oidc-client-image-input.svelte
index 61201d3a..8c928aae 100644
--- a/frontend/src/routes/settings/admin/oidc-clients/oidc-client-image-input.svelte
+++ b/frontend/src/routes/settings/admin/oidc-clients/oidc-client-image-input.svelte
@@ -5,40 +5,53 @@
 	import { Label } from '$lib/components/ui/label';
 	import { m } from '$lib/paraglide/messages';
 	import { LucideX } from '@lucide/svelte';
+	import type { Snippet } from 'svelte';
 
 	let {
 		logoDataURL,
 		clientName,
 		resetLogo,
-		onLogoChange
+		onLogoChange,
+		light,
+		tabTriggers
 	}: {
 		logoDataURL: string | null;
 		clientName: string;
 		resetLogo: () => void;
 		onLogoChange: (file: File | string | null) => void;
+		tabTriggers?: Snippet;
+		light: boolean;
 	} = $props();
+
+	let id = `oidc-client-logo-${light ? 'light' : 'dark'}`;
 </script>
 
-<Label for="logo">{m.logo()}</Label>
-<div class="flex items-end gap-4">
+<Label for={id}>{m.logo()}</Label>
+<div class="flex h-24 items-end gap-4">
+	<div class="flex flex-col gap-2">
+		{#if tabTriggers}
+			{@render tabTriggers()}
+		{/if}
+		<div class="flex flex-wrap items-center gap-2">
+			<UrlFileInput {id} label={m.upload_logo()} accept="image/*" onchange={onLogoChange} />
+		</div>
+	</div>
 	{#if logoDataURL}
 		<div class="flex items-start gap-4">
 			<div class="relative shrink-0">
-				<ImageBox class="size-24" src={logoDataURL} alt={m.name_logo({ name: clientName })} />
+				<ImageBox
+					class="size-24 {light ? 'bg-[#F5F5F5]' : 'bg-[#262626]'}"
+					src={logoDataURL}
+					alt={m.name_logo({ name: clientName })}
+				/>
 				<Button
-					variant="destructive"
 					size="icon"
 					onclick={resetLogo}
-					class="absolute -top-2 -right-2 size-6 rounded-full shadow-md"
+					class="absolute -top-2 -right-2 size-6 rounded-full shadow-md "
 				>
 					<LucideX class="size-3" />
 				</Button>
 			</div>
 		</div>
 	{/if}
-	<div class="flex flex-col gap-3">
-		<div class="flex flex-wrap items-center gap-2">
-			<UrlFileInput label={m.upload_logo()} accept="image/*" onchange={onLogoChange} />
-		</div>
-	</div>
 </div>
diff --git a/frontend/src/routes/settings/admin/oidc-clients/oidc-client-list.svelte b/frontend/src/routes/settings/admin/oidc-clients/oidc-client-list.svelte
index 63f1118b..6f2f9d40 100644
--- a/frontend/src/routes/settings/admin/oidc-clients/oidc-client-list.svelte
+++ b/frontend/src/routes/settings/admin/oidc-clients/oidc-client-list.svelte
@@ -13,6 +13,7 @@
 	import { cachedOidcClientLogo } from '$lib/utils/cached-image-util';
 	import { axiosErrorToast } from '$lib/utils/error-util';
 	import { LucidePencil, LucideTrash } from '@lucide/svelte';
+	import { mode } from 'mode-watcher';
 	import { toast } from 'svelte-sonner';
 
 	const oidcService = new OIDCService();
@@ -22,6 +23,8 @@
 		return tableRef?.refresh();
 	}
 
+	const isLightMode = $derived(mode.current === 'light');
+
 	const booleanFilterValues = [
 		{ label: m.enabled(), value: true },
 		{ label: m.disabled(), value: false }
@@ -103,7 +106,7 @@
 	{#if item.hasLogo}
 		<ImageBox
 			class="size-12 rounded-lg"
-			src={cachedOidcClientLogo.getUrl(item.id)}
+			src={cachedOidcClientLogo.getUrl(item.id, isLightMode)}
 			alt={m.name_logo({ name: item.name })}
 		/>
 	{:else}
diff --git a/frontend/src/routes/settings/apps/authorized-oidc-client-card.svelte b/frontend/src/routes/settings/apps/authorized-oidc-client-card.svelte
index 96de4ad1..e6e2e325 100644
--- a/frontend/src/routes/settings/apps/authorized-oidc-client-card.svelte
+++ b/frontend/src/routes/settings/apps/authorized-oidc-client-card.svelte
@@ -40,7 +40,7 @@
 				<ImageBox
 					class="size-14"
 					src={client.hasLogo
-						? cachedOidcClientLogo.getUrl(client.id)
+						? cachedOidcClientLogo.getUrl(client.id, isLightMode)
 						: cachedApplicationLogo.getUrl(isLightMode)}
 					alt={m.name_logo({ name: client.name })}
 				/>
diff --git a/tests/specs/oidc-client-settings.spec.ts b/tests/specs/oidc-client-settings.spec.ts
index c44c4e22..ed2756c3 100644
--- a/tests/specs/oidc-client-settings.spec.ts
+++ b/tests/specs/oidc-client-settings.spec.ts
@@ -19,7 +19,10 @@ test.describe('Create OIDC client', () => {
 		await page.getByRole('button', { name: 'Add another' }).click();
 		await page.getByTestId('callback-url-2').fill(oidcClient.secondCallbackUrl);
 
-		await page.getByLabel('logo').setInputFiles('assets/pingvin-share-logo.png');
+		await page.locator('[role="tab"][data-value="light-logo"]').first().click();
+		await page.setInputFiles('#oidc-client-logo-light', 'assets/pingvin-share-logo.png');
+		await page.locator('[role="tab"][data-value="dark-logo"]').first().click();
+		await page.setInputFiles('#oidc-client-logo-dark', 'assets/pingvin-share-logo.png');
 
 		if (clientId) {
 			await page.getByRole('button', { name: 'Show Advanced Options' }).click();
@@ -46,7 +49,7 @@ test.describe('Create OIDC client', () => {
 		await expect(page.getByLabel('Name')).toHaveValue(oidcClient.name);
 		await expect(page.getByTestId('callback-url-1')).toHaveValue(oidcClient.callbackUrl);
 		await expect(page.getByTestId('callback-url-2')).toHaveValue(oidcClient.secondCallbackUrl);
-		await expect(page.getByRole('img', { name: `${oidcClient.name} logo` })).toBeVisible();
+		await expect(page.getByRole('img', { name: `${oidcClient.name} logo` }).first()).toBeVisible();
 
 		const res = await page.request.get(`/api/oidc/clients/${resolvedClientId}/logo`);
 		expect(res.ok()).toBeTruthy();
@@ -67,14 +70,17 @@ test('Edit OIDC client', async ({ page }) => {
 
 	await page.getByLabel('Name').fill('Nextcloud updated');
 	await page.getByTestId('callback-url-1').first().fill('http://nextcloud-updated/auth/callback');
-	await page.getByLabel('logo').setInputFiles('assets/nextcloud-logo.png');
+	await page.locator('[role="tab"][data-value="light-logo"]').first().click();
+	await page.setInputFiles('#oidc-client-logo-light', 'assets/nextcloud-logo.png');
+	await page.locator('[role="tab"][data-value="dark-logo"]').first().click();
+	await page.setInputFiles('#oidc-client-logo-dark', 'assets/nextcloud-logo.png');
 	await page.getByLabel('Client Launch URL').fill(oidcClient.launchURL);
 	await page.getByRole('button', { name: 'Save' }).click();
 
 	await expect(page.locator('[data-type="success"]')).toHaveText(
 		'OIDC client updated successfully'
 	);
-	await expect(page.getByRole('img', { name: 'Nextcloud updated logo' })).toBeVisible();
+	await expect(page.getByRole('img', { name: 'Nextcloud updated logo' }).first()).toBeVisible();
 	await page.request
 		.get(`/api/oidc/clients/${oidcClient.id}/logo`)
 		.then((res) => expect.soft(res.status()).toBe(200));