Board Thread:Support Requests - Getting Technical/@comment-25255952-20141010225514/@comment-2170536-20141017080413

Unfortunately it appears that Wikia's implementation of LaTeX doesn't support \pagecolor, or else that would have been a simple solution. It does support \color, which allows you to do things like $$\color{red}y=mx+b$$, but unfortunately that doesn't solve your problem. Perhaps a Special:Contact for someone to update LaTeX to the latest version?