How do I stop the chat menu rolls from having a purple background and black text when in dark mode?

How do I stop the chat menu rolls from having a purple background and black text when in dark mode? It's freakin' unreadable. 

Hi Vitamin! It's hard to answer that question without knowing several key pieces of information: Are you using roll templates for your chat menus? If so, what sheet are you using? Can you supply a screenshot of what you are seeing? Can you supply a macro that is producing the troublesome output? Or if the roll is the result of clicking on a roll button in a sheet, let us know which sheet and button. Those questions would be the bare minimum, since there are lots of things that can format chat output.