User blog comment:Rupert Giles/Global Navigation January Update/@comment-5441128-20150204204919/@comment-1038387-20150204210906

The color customization was a suggested solution to a problem - the intrusiveness on dark wikis. They went for a different solution.

Don't expect concrete answers - that's not what feedback requests are for, not on Wikia, not anywhere else. Nobody'll ever outright say "good idea, we'll do that". Nope. "Thanks for the feedback, we'll think about it". It's a standard practice to a) don't tie yourself down to something and b) give an individual user credit for something that isn't unique.