FixFileHistoryTableColor

 is a stylesheet that fixes the background color of the table of the file history section in file pages for dark wikis, turning them from light gray tables with almost the same text color to black tables with white text color.

This fix isn't needed for the Monobook skin because light and dark wikis look almost the same theme-wise, meaning that both light and dark wikis are light-themed in Monobook, unless if CSS was applied to Monobook to make it dark. In this case, all wikis in Monobook by default have a dark text color, unlike the dark wikis in Oasis, which automatically get a light text color for being a dark wiki.

Code
Add the following CSS in your wiki's Wikia.css.