diff --git a/apps/theming/lib/Service/BackgroundService.php b/apps/theming/lib/Service/BackgroundService.php
index b349af73a57f3..1b948c7300a8a 100644
--- a/apps/theming/lib/Service/BackgroundService.php
+++ b/apps/theming/lib/Service/BackgroundService.php
@@ -60,14 +60,14 @@ class BackgroundService {
 			'description' => 'Abstract background picture in yellow and white color whith a flower on it',
 			'attribution_url' => 'https://stocksnap.io/photo/soft-floral-XOYWCCW5PA',
 			'theming' => self::THEMING_MODE_DARK,
-			'primary_color' => '#9f652f',
+			'primary_color' => '#D8A06C',
 		],
 		'ted-moravec-morning-fog.jpg' => [
 			'attribution' => 'Morning fog (Ted Moravec, Public Domain)',
 			'description' => 'Background picture of a forest shrouded in fog',
 			'attribution_url' => 'https://flickr.com/photos/tmoravec/52392410261',
 			'theming' => self::THEMING_MODE_DARK,
-			'primary_color' => '#114c3b',
+			'primary_color' => '#38A084',
 		],
 		'stefanus-martanto-setyo-husodo-underwater-ocean.jpg' => [
 			'attribution' => 'Underwater ocean (Stefanus Martanto Setyo Husodo, CC0)',
@@ -92,7 +92,7 @@ class BackgroundService {
 			'description' => 'Montage of a cetonia aurata bug that takes off with white background',
 			'attribution_url' => 'https://commons.wikimedia.org/wiki/File:Cetonia_aurata_take_off_composition_05172009.jpg',
 			'theming' => self::THEMING_MODE_DARK,
-			'primary_color' => '#56633d',
+			'primary_color' => '#869171',
 		],
 		'dejan-krsmanovic-ribbed-red-metal.jpg' => [
 			'attribution' => 'Ribbed red metal (Dejan Krsmanovic, CC BY)',
@@ -147,7 +147,7 @@ class BackgroundService {
 			'description' => 'Abstract background picture of pink tapioca bubbles',
 			'attribution_url' => 'https://www.flickr.com/photos/byrawpixel/27665140298/in/photostream/',
 			'theming' => self::THEMING_MODE_DARK,
-			'primary_color' => '#7b4e7e',
+			'primary_color' => '#b17ab4',
 		],
 		'nasa-waxing-crescent-moon.jpg' => [
 			'attribution' => 'Waxing crescent moon (NASA, Public Domain)',
@@ -166,14 +166,14 @@ class BackgroundService {
 			'description' => 'Background picture of mountains during sunset or sunrise',
 			'attribution_url' => 'https://www.flickr.com/photos/90975693@N05/17136440246',
 			'theming' => self::THEMING_MODE_DARK,
-			'primary_color' => '#7f4f70',
+			'primary_color' => '#c074a9',
 		],
 		'lali-masriera-yellow-bricks.jpg' => [
 			'attribution' => 'Yellow bricks (Lali Masriera, CC BY)',
 			'description' => 'Background picture of yellow bricks with some yellow tubes',
 			'attribution_url' => 'https://www.flickr.com/photos/visualpanic/3982464447',
 			'theming' => self::THEMING_MODE_DARK,
-			'primary_color' => '#7f5700',
+			'primary_color' => '#bc8210',
 		],
 	];
 
diff --git a/apps/theming/lib/Themes/CommonThemeTrait.php b/apps/theming/lib/Themes/CommonThemeTrait.php
index 42ee6212cee84..dd5b25e1a2960 100644
--- a/apps/theming/lib/Themes/CommonThemeTrait.php
+++ b/apps/theming/lib/Themes/CommonThemeTrait.php
@@ -88,13 +88,13 @@ protected function generatePrimaryVariables(string $colorMainBackground, string
 	protected function generateGlobalBackgroundVariables(): array {
 		$backgroundDeleted = $this->config->getAppValue(Application::APP_ID, 'backgroundMime', '') === 'backgroundColor';
 		$hasCustomLogoHeader = $this->util->isLogoThemed();
-		$isDefaultPrimaryBright = $this->util->invertTextColor($this->defaultPrimaryColor);
+		$isPrimaryBright = $this->util->invertTextColor($this->primaryColor);
 
 		$variables = [];
 
 		// Default last fallback values
 		$variables['--image-background-default'] = "url('" . $this->themingDefaults->getBackground() . "')";
-		$variables['--color-background-plain'] = $this->defaultPrimaryColor;
+		$variables['--color-background-plain'] = $this->primaryColor;
 
 		// Register image variables only if custom-defined
 		foreach (ImageManager::SUPPORTED_IMAGE_KEYS as $image) {
@@ -108,11 +108,11 @@ protected function generateGlobalBackgroundVariables(): array {
 		// If primary as background has been request or if we have a custom primary colour
 		// let's not define the background image
 		if ($backgroundDeleted) {
-			$variables['--color-background-plain'] = $this->defaultPrimaryColor;
+			$variables['--color-background-plain'] = $this->primaryColor;
 			$variables['--image-background-plain'] = 'yes';
 			$variables['--image-background'] = 'no';
 			// If no background image is set, we need to check against the shown primary colour
-			$variables['--background-image-invert-if-bright'] = $isDefaultPrimaryBright ? 'invert(100%)' : 'no';
+			$variables['--background-image-invert-if-bright'] = $isPrimaryBright ? 'invert(100%)' : 'no';
 		}
 
 		if ($hasCustomLogoHeader) {
@@ -133,14 +133,14 @@ protected function generateUserBackgroundVariables(): array {
 			$adminBackgroundDeleted = $this->config->getAppValue(Application::APP_ID, 'backgroundMime', '') === 'backgroundColor';
 			$backgroundImage = $this->config->getUserValue($user->getUID(), Application::APP_ID, 'background_image', BackgroundService::BACKGROUND_DEFAULT);
 			$currentVersion = (int)$this->config->getUserValue($user->getUID(), Application::APP_ID, 'userCacheBuster', '0');
-			$isPrimaryBright = $this->util->invertTextColor($this->themingDefaults->getColorPrimary());
+			$isPrimaryBright = $this->util->invertTextColor($this->primaryColor);
 
 			// The user removed the background
 			if ($backgroundImage === BackgroundService::BACKGROUND_DISABLED) {
 				return [
 					// Might be defined already by admin theming, needs to be overridden
 					'--image-background' => 'none',
-					'--color-background-plain' => $this->themingDefaults->getColorPrimary(),
+					'--color-background-plain' => $this->primaryColor,
 					// If no background image is set, we need to check against the shown primary colour
 					'--background-image-invert-if-bright' => $isPrimaryBright ? 'invert(100%)' : 'no',
 				];
@@ -151,7 +151,7 @@ protected function generateUserBackgroundVariables(): array {
 				$cacheBuster = substr(sha1($user->getUID() . '_' . $currentVersion), 0, 8);
 				return [
 					'--image-background' => "url('" . $this->urlGenerator->linkToRouteAbsolute('theming.userTheme.getBackground') . "?v=$cacheBuster')",
-					'--color-background-plain' => $this->themingDefaults->getColorPrimary(),
+					'--color-background-plain' => $this->primaryColor,
 				];
 			}
 
@@ -159,7 +159,7 @@ protected function generateUserBackgroundVariables(): array {
 			if ($backgroundImage === BackgroundService::BACKGROUND_DEFAULT && $adminBackgroundDeleted) {
 				return [
 					// --image-background is not defined in this case
-					'--color-background-plain' => $this->themingDefaults->getColorPrimary(),
+					'--color-background-plain' => $this->primaryColor,
 					'--background-image-invert-if-bright' => $isPrimaryBright ? 'invert(100%)' : 'no',
 				];
 			}
@@ -168,7 +168,7 @@ protected function generateUserBackgroundVariables(): array {
 			if (isset(BackgroundService::SHIPPED_BACKGROUNDS[$backgroundImage])) {
 				return [
 					'--image-background' => "url('" . $this->urlGenerator->linkTo(Application::APP_ID, "img/background/$backgroundImage") . "')",
-					'--color-background-plain' => $this->themingDefaults->getColorPrimary(),
+					'--color-background-plain' => $this->primaryColor,
 					'--background-image-invert-if-bright' => BackgroundService::SHIPPED_BACKGROUNDS[$backgroundImage]['theming'] ?? null === BackgroundService::THEMING_MODE_DARK ? 'invert(100%)' : 'no',
 				];
 			}
diff --git a/core/css/header.scss b/core/css/header.scss
index 507ccf5e34b37..a9acb90adbd25 100644
--- a/core/css/header.scss
+++ b/core/css/header.scss
@@ -174,12 +174,12 @@
 		> .header-menu:not(.user-menu):not(.unified-search-menu) {
 			// For general
 			> .header-menu__trigger {
-				filter: var(--background-image-invert-if-bright) !important;
+				filter: var(--background-image-invert-if-bright);
 			}
 
 			// For assistant button
 			> .trigger {
-				filter: var(--background-image-invert-if-bright) !important;
+				filter: var(--background-image-invert-if-bright);
 			}
 		}
 		> div,
diff --git a/core/src/components/AppMenu.vue b/core/src/components/AppMenu.vue
index 2213840a7c0df..d6e5c9826dcea 100644
--- a/core/src/components/AppMenu.vue
+++ b/core/src/components/AppMenu.vue
@@ -208,7 +208,6 @@ $header-icon-size: 20px;
 			text-overflow: ellipsis;
 			overflow: hidden;
 			letter-spacing: -0.5px;
-			filter: var(--background-image-invert-if-bright);
 		}
 
 		&:hover,