migrate admin settings

lib/AppInfo/Application.php

@@ -13,6 +13,7 @@ use OCP\AppFramework\App;
 use OCP\AppFramework\Bootstrap\IBootContext;
 use OCP\AppFramework\Bootstrap\IBootstrap;
 use OCP\AppFramework\Bootstrap\IRegistrationContext;
+use OCA\Theming\ThemingDefaults;
 use OCP\EventDispatcher\IEventDispatcher;
 use OCP\IConfig;
 use OCP\INavigationManager;
@@ -20,6 +21,7 @@ use OCP\IUserSession;
 use OCP\L10N\IFactory;
 use OCP\Util;
 use Psr\Container\ContainerInterface;
+use OCA\SideMenu\Service\Color;
 
 /**
  * class Application.
@@ -81,6 +83,12 @@ class Application extends App implements IBootstrap
                 $c->get(IConfig::class),
             );
         });
+
+        $context->registerService(Color::class, function (ContainerInterface $c) {
+            return new Color(
+                $c->get(ThemingDefaults::class),
+            );
+        });
     }
 
     public function boot(IBootContext $context): void