User blog comment:Rupert Giles/Introducing Updated Global Navigation/@comment-25808182-20141011034843/@comment-14310002-20141011040334

I know for a fact that, Wikia is trying to make it fit more seamlessly on your pages. It's still getting updated. On your individual wikis, you are able to control the color (at least for the old one). It should optional for individual users, not wikis. Wikia wants to keep the global head the same around every wiki, hence  "individual users". :)