Board Thread:Support Requests - Designing Your Wikia/@comment-26396882-20150901001351/@comment-32875966-20171120200921

Fandyllic wrote: The above code is CSS.

Personal CSS should go in community.wikia.com/wiki/Special:MyPage/global.css (for all wikis), yourwiki.wikia.com/wiki/Special:MyPage/wikia.css (for default Oasis skin on a specific wiki), or yourwiki.wikia.com/wiki/Special:MyPage/common.css (for all skins on a specific wiki). See Help:Personal CSS and JS.

yes, how you gett it is the Nitro thingy.