Hey Fives,
If we were playing "Stump the band"... I would owe your table a round of drinks!!!... You got me! I don't know!
I cannot honestly say that a "Blush" or "Marbled" colored flesh chinook are cross-breeds but it would seem a reasonable assumption.
To determine the answer to that question, one would have to know if the ability to retain red pigment was a dominant or recessive gene trait. That type of genetic analysis is well beyond my training and experience in the fisheries biology field.
All I know is that if Tobeck and I ever catch a white one he has to give it to me!!!