Someone will come and explain it better for you, but this is what I think...
I don't think it is possible because you will eithier get a white-based budgie (Causing the white face and blue chest), a yellow-based budgie (Which makes them green and have a yellow face) or a yellow-faced budgie.
One way to explain it is all budgies have blue bellies, but they turn green because they are yellow-based, and stay blue when they are white-based. Yellow-based budgies have yellow faces just because they are yellow-based. Yellow-faced budgies are different story though, but I'm not going to get into that. White-based budgies just don't have the yellow, which leaves them with a white face, and blue belly. Do you understand what I'm trying to say?
I'm not really sure, but at least I tried to explain.