Socks.

[Jurassic Referee]

Originally Posted by BillyMac

If I were a high school point guard, I wouldn't wear any shoes or socks that would call attention to my feet, maybe I might get away with a travel or two that I Iwouldn't get away with if I was wearing striped socks and bright orange shoes.

I've known coaches that actually insisted that their players wear black shoes. They think that they might steal the odd close OOB call by an official not noticing a black shoe barely touch a black boundary line. They reason that it's harder to pick up than a white shoe on a black line.