Aran, Anne is right in that the only way to be sure is to talk to the breeder and understand what he is using for breeding. If they are all, what I consider "non-standard", then I call them easter eggers. If meet the standard for Ameraucana, then you have ameraucana. In that case, there is definitely the opportunity of getting nice ones and not-so-nice ones, as no one can guarantee that every bird will be perfect and meet the standard.
My duckwingish rooster, Oreo and all of his hens are Easter Eggers, as far as I'm concerned. They are not perfect ameraucana based on the standard of perfection. I chose the color of birds I did, to keep the variety in that breeding pen. I also use black ameraucana in my EE pen for additional color and will be adding a white ameraucana pullet as well soon (she's still growing out). I still consider them EEs because once you have a mix in there, they are EEs as the ameraucana strain has been damaged.
As for my eggs, the majority of my eggs are teal blue from this pen, but I do get a couple olive green and a couple pinkish brown ones. The one brown egg is almost a mauve color..very pretty.
My Araucana lay various shades of blue and bluish green eggs.
My bantam buff ameraucana only lay blue eggs.
Jody