Well, it even changes from state to state in the south. I'm from Florida and we tend to dress a little bit differently than other traditionally Southern states.
I didn't really ever notice it until my parents came to visit me one time at college in Alabama. My mom wore a red dress to our version of Homecoming and everyone kept commenting on her dress. It's not that it was ugly, just that no one wears a lot of color there for some reason. I looked around and even I was wearing black.