When you turn on a Major League Baseball game, you can often tell within moments which team is the home team and which is the away team. The common practice by teams in the MLB is to wear white (or mostly white) uniforms at home and to wear gray (or mostly gray) unis when on the road.
While this is a regular exercise now, baseball legend has it that this tradition began due to the fact that visiting teams had no access to laundry facilities, and so the players were not able to clean their uniforms. The darker uniforms, or the “road grays,” could conceal the dirt and grass stains better than white uniforms.
Not every team does this today, of course. And given better access to laundry facilities, they don’t need to. But it’s an interesting story and practice, all the same.