As a transplant from the Northeast, I can attest to color and tucking in. After four years at Emory and four years living here, my short colors have gone from Khaki/Lighter Khaki to White/Blue/Sky Blue/Light Green/Salmon/Yellow and from not tucking in anything except into trousers to tucking in anything that has a collar.
Also you can't forget boat shoes and croakies for leisurewear. So many boat shoes (I wear often) and croakies (I will never buy)
Indeed, game day is the day when nearly anyone can become southern trad for a day in the south. It goes beyond wearing a striped tie in the teams colors, or wearing a hat with the team logo on it. You will see head to toe representations of school colors no matter how outlandish, especially at football games. When I say this I don't mean to compare it to people wearing team t-shirts or the like. I'm talking about chinos, button down shirts, blazers, and even shoes all decked with team colors or logos.
I always wondered if they displayed these in all regions or just the south:
There's two full shelves dedicated to these for multiple schools at the two stores I go to in Atlanta.