diff --git a/apps/theming/lib/ThemingDefaults.php b/apps/theming/lib/ThemingDefaults.php
index 8219b8b135330..83b021f04d185 100644
--- a/apps/theming/lib/ThemingDefaults.php
+++ b/apps/theming/lib/ThemingDefaults.php
@@ -231,10 +231,10 @@ public function getColorPrimary(): string {
 			$themingBackground = $this->config->getUserValue($user->getUID(), Application::APP_ID, 'background', '');
 			// If the user selected the default background
 			if ($themingBackground === '') {
-				return BackgroundService::DEFAULT_COLOR;
+				return $defaultColor;
 			}
 
-			// If the user selected a specific colour
+			// If the user selected a valid custom colour
 			if (preg_match('/^\#([0-9a-f]{3}|[0-9a-f]{6})$/i', $themingBackground)) {
 				return $themingBackground;
 			}
@@ -245,11 +245,6 @@ public function getColorPrimary(): string {
 			}
 		}
 
-		// If the default color is not valid, return the default background one
-		if (!preg_match('/^\#([0-9a-f]{3}|[0-9a-f]{6})$/i', $defaultColor)) {
-			return BackgroundService::DEFAULT_COLOR;
-		}
-
 		// Finally, return the system global primary color
 		return $defaultColor;
 	}
@@ -259,9 +254,12 @@ public function getColorPrimary(): string {
 	 */
 	public function getDefaultColorPrimary(): string {
 		$color = $this->config->getAppValue(Application::APP_ID, 'color');
+
+		// If the color is invalid, fallback to default
 		if (!preg_match('/^\#([0-9a-f]{3}|[0-9a-f]{6})$/i', $color)) {
-			$color = '#0082c9';
+			$color = BackgroundService::DEFAULT_COLOR;
 		}
+
 		return $color;
 	}
 
diff --git a/tests/acceptance/features/app-theming.feature b/tests/acceptance/features/app-theming.feature
index 7b734f7f3183b..9744cc49eda1d 100644
--- a/tests/acceptance/features/app-theming.feature
+++ b/tests/acceptance/features/app-theming.feature
@@ -13,7 +13,8 @@ Feature: app-theming
     And I see that the non-plain background color variable is eventually "#0082c9"
     When I set the "Color" parameter in the Theming app to "#C9C9C9"
     Then I see that the parameters in the Theming app are eventually saved
-    And I see that the primary color is eventually "#006aa3"
+    # Default user background follows admin theming
+    And I see that the primary color is eventually "#C9C9C9"
     And I see that the non-plain background color variable is eventually "#C9C9C9"
 
   Scenario: resetting the color updates the primary color
@@ -23,9 +24,10 @@ Feature: app-theming
     And I see that the color selector in the Theming app has loaded
     And I set the "Color" parameter in the Theming app to "#C9C9C9"
     And I see that the parameters in the Theming app are eventually saved
-    And I see that the primary color is eventually "#006aa3"
+    And I see that the primary color is eventually "#C9C9C9"
     And I see that the non-plain background color variable is eventually "#C9C9C9"
     When I reset the "Color" parameter in the Theming app to its default value
     Then I see that the parameters in the Theming app are eventually saved
+    # Default user background follows admin theming
     And I see that the primary color is eventually "#006aa3"
     And I see that the non-plain background color variable is eventually "#0082c9"