A thought on silver and blue. We had a guy in our regular flight of six with a silver - close to the polyspray color and blue - sort of a medium blue. He was the guy that was always told to turn on his "blinkers" because it was easy to lose him in the background when we were flying our loose formations on our various trips. Then once as a flight of four we were mistaken for a flight of three by a ground observer. This is not given as advice, but rather as an observation.