I think that could be very nice to give the players an option to choose one colour scheme between those already available.
So everybody could take that blue or white Fokker DVII in each of his games, or maybe you can have a full "squadron action" game of stars-striped Spads.
I know that variety makes the players more easily distinguishable in a game but what about all those almost identical SE5 or Nie17?
What about placing a cascade menu (or a link directing to the planes' drawings) near the "choose your plane" button?

GG