School colors
I did my undergrad at Tufts University who had the misfortune of having school colors of brown and blue. Since Tufts quickly realized that this hideous color combination would not sell any clothes, Tufts branded clothing was sold in all sorts of colors. As a result, I certainly bought more than my fair share.
At Stanford, all they sell is red clothing! I walk in to the bookstore and feel like a Tabasco factory has exploded in hell! Seriously, how much red clothing can they expect someone to buy??