If you already have blues breed blues to blues and you will get a lot of blues. Everyone is basically right about the genetics of blue, but blue is considered the dominant trait because we see the phenotype in the hybrid. In genetics the recessive trait is called recessive because it is masked by the dominant trait in the hybrid or heterozygote. On a black genetic background BlBl birds are mostly white, Blbl birds are gray, and blbl birds are black. I have gotten Bl out of dominant white White Leghorns, but crossing a white bird to a black bird will not usually give you a gray bird.
Blue black is a genotype versus phenotype.
Phenotype is what you see and it matches the genes, in genotype you see one thing but there are genes for something else present as well. Occassionally you will see a lighter under color in the fluff. This is a private posting area. A valid username and password combination is required to post messages to this discussion.