User blog comment:Sannse/Important Updates on Wikia’s New Look/@comment-2240864-20101001045243/@comment-761251-20101001193636

Theme designer currently lets you control these things:
 * choose one of 11 preset themes, including "dragstrip" and "aliencrate"
 * set the "outside" background to a color or a graphic (tiled or not)
 * set colors for the page background, the header bar and tool bar, buttons, and links
 * set the wiki name that appears on every page, format its font and size, or replace it with a 250x65 pixel .png image