What are the Football Referee Flag colors?

Answer 1

They use yellow flags for penalties, and blue flags to represent a loose ball on the field. Coaches of the teams playing use red flags, which challenge the play that just occurred. Coaches only get two challenges a game (three if they win both the first two challenges), if they are wrong they will lose the challenge and a timeout.

Answer 2

normally it would be black but sometimes depending on the players kit it could be either yellow shirt or green shirt

Answer 3

red or yellow

Answer 4

Black

Answer 5

White