Board Thread:Support Requests - Designing Your Wiki/@comment-28082950-20170614230139/@comment-31420862-20170615084031

Good to know. c: While I also am rather confused by the "most forms of CSS and JS customization to the headers" part, I would presume that changing text color of local navigation with CSS might also come under customization policy violation considering that there is no part indicating exception for CSS customization of local navigation on Help:Customization policy. And, as far as I am aware, the Edit button does come under the article header, so I doubt a CSS change for it would be allowed either. However, this is just what I personally have perceived. I might be wrong in my understanding. ^^ For an absolute confirmation, you could inquire Staff regarding it through Special:Contact/general. :)