Is black or grey a dominate color?

[J-Habs]

He is blue, so he has a 50% chance of passing the blue gene on to his chicks. The blue gene diluted any black pigment to grey (blue), so if any of his chicks inherited the blue gene from him any parts of the pattern that would have been black will be blue.

Bielefelders are barred, and any chicks hatched from that cross would be sex linked, barred cockerels and non-barred females. With the australorp I would expect more or less solid chicks (with some leakage). These two hens are going to produce chicks with black pigment, so these chicks are where you're going to see blue if your rooster passes on the blue gene.

I'm not as familiar with red sexlink genetics, and there are several ways to get red sex sex linked chicks and without knowing which genetics are involved it's hard to say what to expect. If your sex link is carrying dominant white (turns all black pigment to white) you could potentially end up with white chicks with red or possibly black leakage (one copy of dominant white tends to fail at turning  all the black to white).

Thank you! I'm hoping for a blue barred male from the Bielefelder cross. Not likely, but that would be great!