that pretty much sums it up. kevin says its a monogenetic trait (like every other trait we call a morph) and it has a super form. Yet offers no proof of this claim. Others say it is polygenetic, where multiple genes play a factor in the trait. This seems to be the case looking at inheritance patterns and the fact it pops out of nowhere in multiple collections. Pastel is a monogenetic trait. How yellow/brown it is, the blushing, reduced or not the pattern is are all polygenetic traits that are controlled by multiple genes we don't recognize by themselves.