Several British spitfire photo recon aircraft were pink in WW2.

However this was not to make them dificult to see, but to make the German AA
gunners laugh so much they couldn't shoot straight!

Hope this helps,
Peter


I read where they did a study that the best camo against the sky (opposite
of your question) was a powder pink. Course, the military opted for the
second best, gray. I don't know that an F-15 fully armed and painted pink
instills much fear.