You can set background color for promotion ads you created. Let see an example of, how to set background color for a promotion ads.
Step 1: Administrator -> Components -> Jom Classifieds -> Promotions -> Edit promotions
Advanced Settings => [tab] => Enter the premium class name as per your requirement.
Screenshot 1: After the class name was added
Step 2: Administrator -> Components -> Jom Classifieds -> Global Configuration -> Custom Style
Start with “div#jomclassifieds” , and add the class name with .(dot) as its prefix. Check below screenshot.
Screenshot 2: The result will be displayed as in below screenshot