User blog comment:Susanolivia/Fixed Width, Sidebar, and the Removal of Monaco/@comment-1656767-20101004140642/@comment-8-20101004222517

Or you could use this one on Wikipedia... it makes more sense to use that and keep the help wiki for really specific help for Wikia. There are also some good tools on the web that make color choices easier: this and this are two of my favourites