If you breed a blue male budgie with a grey female budgie what color will the babies be?

What about blue males to black females (with white, or grey) and black to grey female (with white, or grey) ?
A: The only way you can tell the gender of any budgie is to use color to distinguish between male and female budgies.

Males have the "male" gene and females have the "female" gene. Black and white show the dominant gene.