FOSS gamedev and creative worlds

Hello, all. I was wondering if there's a way to add a dark background to my chat. I can't see chat if I'm in a well lit area. I don't care if it's through a mod, or changing a texture or whatever, I will do it. Please help.

Try pressing F10, is that good enough for you?

I mainly play on the hardcore survival servers, and that 2 seconds checking chat, can kill you.