Font Color Question

[jasonclg]

This is probably a really stupid question to ask, but all this css stuff is pretty new to me.

I've managed to make a theme and everything's look good. However there's one user in our shoutbox that just demands to use a font that looks terrible with some of the backgrounds with other themes.

Is there a way to setup some kinda code here that says "If a font is *this* it will show up as *that*"? That way he can use his color on whatever theme he's using but anyone that's got one of the other themes can still read what he's saying without having to highlight it?

Stupid/Silly question I know, but as I said this is really new to me. lol

Thanks a lot.