Use $system

Signed-off-by: Šimon Brandner <[email protected]>

Author: SimonBrandner

res/themes/dark/css/_dark.scss

@@ -97,7 +97,7 @@ $lightbox-background-bg-opacity: 0.85;
 
 // RoomList
 // ********************
-$roomlist-bg-color: rgba(33, 38, 44, 0.90);
+$roomlist-bg-color: rgba($system, 0.90);
 $roomsublist-skeleton-ui-bg: linear-gradient(180deg, #3e444c 0%, #3e444c00 100%);
 $roomtile-default-badge-bg-color: $input-darker-fg-color;
 // ********************