User blog comment:Rupert Giles/Global Navigation Update/@comment-2111068-20141204052002/@comment-5973717-20141204063121

http://dev.wikia.com/wiki/WikiaNavBarHider/code.js has this to a degree. I set it up so it changes the nav bar color to copy the background color of your standard pages. It's not a perfect fix, and the script needs many improvements, but I think it could be a major fix.