Board Thread:Support Requests - Designing Your Wikia/@comment-27111026-20140623035831/@comment-856287-20140623044953

You have to be admin on the wiki where you would like to see your special title appear (or ask an admin to make the edits).

Then, see Help:Custom chat JavaScript and CSS to enable custom chat css (if you haven't already).

Once chat CSS is enabled, you can add the custom CSS to MediaWiki:Chat.css on your wiki: