And, no one is meaning to offend in turn, I'm just saying, a stripe on the head as well as yellow showing up in the actual feathers means there's duckwing or even possibly partridge in the birds' genetics. A true solid blue is just E/E extended, making it solid blue with some white or yellow underside as a chick.
As long as you love them, that's what matters. I just like to let people know of facts.