Manual:Gallery of user styles/Blackwiki
From MediaWiki.org
One of my wikis is part of a game forum so I tried to get the same visuals as the main forum.
Just drop the CSS file saved as a file named main.css at your myskin folder, then go to LocalSettings.php and change $wgDefaultSkin = 'monobook'; to $wgDefaultSkin = 'myskin';
