To answer a question about egg color off the mothers too -
If the the Ameraucana father is actually a real Ameraucana and not an Easter Egger, and if the EE from a brown egg had a father who lays a BLUE egg - Yes. Otherwise, your chances are a little slim, and either you will get khaki greenish brown or just brown.
The mother doesn't exactly decide the offspring's egg color - Both parents do. To get a green egg you'll need a blue and a brown egg parent. Anything else and you'll get just brown or blue-green or something else.