When you apply a Menu Background Color it only displays when you are hovering over the icon or bar. This issue can happen in the Grid Menu and Tab Bar Menu Homescreen Layouts.
In this example, the background color only appears when hovering:
- Click on the BiznessApps link at the top-left section of the interface
- Scroll down to find the Start Over section and click the Start Over button
- Click the View History link
- In the View History pop-up, select the previous version
- Click the Revert Back Button
- Navigate to Create > Design and view the preview of your app
The Tab Bar Menu background color is now correctly displayed.