diff --git a/apps/theming/lib/Command/UpdateConfig.php b/apps/theming/lib/Command/UpdateConfig.php
index 89e4768837230..9fec1c4970ac5 100644
--- a/apps/theming/lib/Command/UpdateConfig.php
+++ b/apps/theming/lib/Command/UpdateConfig.php
@@ -16,7 +16,7 @@
 
 class UpdateConfig extends Command {
 	public const SUPPORTED_KEYS = [
-		'name', 'url', 'imprintUrl', 'privacyUrl', 'slogan', 'color', 'primary_color', 'disable-user-theming'
+		'name', 'url', 'imprintUrl', 'privacyUrl', 'slogan', 'color', 'primary_color', 'background_color', 'disable-user-theming'
 	];
 
 	public function __construct(