User blog comment:Rupert Giles/Global Navigation Update/@comment-25261281-20141203212347/@comment-452-20141203221729

According to what we've been told - yes, Memory Alpha changing it to black should be considered a violation.

However, large wikis have been known to be given special treatment, such as disney.wikia and callofduty.wikia being allowed to have a background on the old bar.

I notice that wowiki has not yet changed theirs, but I also expect them to be allowed special treatment.