Know that your 'ameraucana' from a hatchery might not be a pure Ameraucana but a mix called EE's (easter eggers).
But if those birds do lay a true blue egg they may still work for making olive eggers...worked for me.
If you order from My Pet Chicken they do differentiate between EE's and Ameraucanas. The EE's are three dollars and change apiece for a pullet and the Ameraucana pullet is $20.00.