Changed Admin/User Panel color scheme

Author: JulianPrieber

studio/css/style-dashboard.css

@@ -8226,7 +8226,7 @@ h1, h2, h3, h4, h5,
 #sidebar {
   min-width: 300px;
   max-width: 300px;
-  background: #416f6b;;
+  background: #343a40;
   color: #fff;
   -webkit-transition: all 0.3s;
   -o-transition: all 0.3s;