Board Thread:Support Requests - Community Management/@comment-24798865-20180422191802/@comment-9605025-20180422231023

Only admins can use ThemeDesigner. Bureaucrats, content moderators, discussion moderators, and the like do not have that permission. If it is absolutely necessary, you can see if Wikia will make an exception on your wiki. However, you would need a really, really, really (yes, 3 "really"s) super good reason for it.