Click the paintbrush icon to adjust theme colors and Shard backgrounds
1. Here you can adjust universal color theme options which can be linked to any and all backgrounds and buttons. Click on the colors to open the click and drag color editor or enter color codes in the box for a perfect match.
2. You can customize a background color from here
3. You may select from a list of preset background images or select custom and then enter any image url in the field provided.