Board Thread:Support Requests - Getting Technical/@comment-26474238-20131123042154/@comment-168424-20131123052911

To get the best help there are a few questions that probably need answers:
 * Which wiki are you planning to put this on?
 * Have you looked at Help:Tabber and not found enough info?
 * Do you know the hex code for "Bleached Yellow"?

There is a lot of great info at places like W3schools CSS home to get you started with CSS.

You can also put experimental CSS that will only affect your view of the wiki in Special:MyPage/wikia.css (assuming you aren't worried about monobook).