Excellent Nick. It needs to be pointed out that all colors were subject to lighting conditions. From a distance, all aircraft are dark silhouettes and moving at speed. I have read about an Allied gun crew allowing enemy aircraft to pass while later firing on a group of friendly aircraft.
It appears camouflage was most effective when concealing aircraft on the ground and in dogfights where one pilot could dive toward the ground and be lost to his pursuer.
https://www.ebay.com/itm/35786003693...3ABFBMgtrylNhm