Board Thread:Support Requests - Designing Your Wikia/@comment-25258875-20140816035325

My wiki (miaandmepedia.wikia.com) is using Lua. As I know it, we use InfoboxBuilder to make an infobox, and we save all the css styling in MediaWiki:Common.css. I  know how to make the infoboxes using that, but I do not know how to add background colors to the headers and labels in an infobox.This is the example of the infobox I'm asking (from Wikipedia):

What is the code for doing this? If anyone knows, please help me. Thanks for you attention! 