Also wanted to leave this here. Another blue laying chicken that is not based on Ameraucana or the EE's the Ameraucana came from.
DongXiang blue egg layer
Lol, legbars before they got accepted where EE at some point in the development. Quick note so where Ameraucana and all others accepted into the standard started as mutts or backyard chickens. Someone saw beauty in a color or trait and spent a great deal of time getting it to bread true.
All they need is the blue egg gene. That's what I was trying to get at in that post. The cross doest have to have Ameraucana in it at all, but I also wanted to point out legbars have them way back in the mix.
A few home made EE. They are Spitzhauben and Ameraucana crosses. The roosters in the middle could be their father. Staring on the left, Pearl, Sultan (not a mix) and Sterling.