on if you have a black jacket over it.

It's not going to be crazy cold on Sat night at 11pm. You won't need a coat, but may need long sleeves. You may not have a white jacket so instead of bringing the non-white jacket you have at home... considering wearing thermals under your white tee-shirt - or wear a white sweatshirt etc.

White outs look awesome when done right. But that involves not coving up your white tee-shirt with a colorful jacket.