I don't know if this is true or not, but I've heard that strawberry/ dragonblood peacocks were bred by selecting the OB morph for less and less black spotting. In my experience with breeding quite a few of them, I have often seen black specks on their heads in particular, but sometimes spots elsewhere on the body. The albino morph would hide that, so even if the breeder were selecting away from any black pigmentation, they could only make progress with non-albino fish.