Layout: Add themes

youtube/templates/channel.html

@@ -31,7 +31,7 @@
             grid-auto-flow: column;
             justify-content:start;
             
-            background-color: #aaaaaa;
+            background-color: var(--interface-color);
             padding: 3px;
             padding-left: 6px;
         }
@@ -44,7 +44,6 @@
             padding-top: 8px;
             padding-bottom: 8px;
             padding-left: 6px;
-            background-color: #bababa;
             margin-bottom: 10px;
         }
             #number-of-results{