"Freak of the Week": PAY ATTENTION TO ME NOW

[Inquisitive Raven]

At a guess, the copypasta included a color attribute on the text that just happened to match the background of the theme, i.e. black.  The easy fix would be to edit the post using the advanced editor, highlight the problem text and click <Remove Formatting>. That's the "A" with the little "x" in a red circle in the lower right corner of the icon , btw.