Most blue birds are silver based if that helps.
Yes, that much I know. So what about a red bird with a blue tail? I am assuming he is red with blue leakage but I have only dealt with red leakage before.
I had a couple of black hens from hatching eggs I bought from a breeder that developed red leakage and she bought them back stating that her daughter must have mixed up their Red Star eating eggs with the Orpington hatching eggs. I had some oops hatches of my own when my "guaranteed colored egg layers" from a breeder layed beige eggs instead (after I culled all the chicks with yellow legs and kept the ones that at least looked correct before I realized that the breeder lied). I never would have hatched mixed breed chicks on purpose but I thought my Easter Eggers would lay colored eggs for eating instead of beige eggs for hatching. Now I know better than to trust raising chicks into hens and not getting what I expected so I only hatch my own and know that what I am getting is exactly what I wanted.