Board Thread:Support Requests - Designing Your Wikia/@comment-29559965-20160918162428/@comment-99.63.16.95-20160918182748

So, this is the coding they use:

You add it to the MediaWiki:Wikia.css on your wiki, changing the username to yours. The image icon looks to be an image that they created, so you would probably have to make one, or have someone help you make one for your wiki.