Thread:Project:Support desk/Change The Color/reply (5)

Yes, you should put this on that page in your wiki.

You could also modify one of the files, which you found there, but that is not recommended: First you cannot just change these files, but you need file system access while you can edit the CSS on that page like any other wiki page. And your changes in one of these files would be overwritten when you next update MediaWiki. So better use the wiki page.