Font colour based on rank

[Platinumgamer]

Hi,

I'm hoping to find a way to allow for certain ranks to have their posts appear in certain font colours to show that they are of a certain rank. Currently, I'm not sure how to do this (hence the reason for posting it here...), but to understand what I mean a bit more clearly, perhaps a hypothetical example would be best:

1.) The average, or base, user makes a post in the typical font colour assigned to the style. (for this example, we'll say light grey font...)
2.) A Moderator could make a post and have the text show up in, say white to show that s/he is a moderator (since Mods and Smods are basically the same level, they'd be the same colour...)
3.) and if an Admin posted, let's say that his/her posts showed up in, say, green font, it would show up as such.

I know that was a very vague and undescriptive example, but I also hope you understand what I'm looking for here. Is there any way to accomplish this?

Thanks for your time.