- (idiomatic) To blush.
- After mentioning her ex boyfriend, she started to go red.
- (idiomatic) To become sunburnt.
- Red-haired people go red more easily than dark-haired people.
- (idiomatic, US politics) Of states, counties, or Congress seats, to be carried by a Republican candidate in a given U.S. election.
- Tennessee went blue in the 1990s but went red in the 2000s.