If it's an EE, it has some Ameraucana in the gene pool.... what's lucky was that you got the blue egg gene!That looks like the color egg one of my girls' lays.
The blue on the far right is my Easter Egger (not an Ameraucana, which only lays blue - we just got lucky). I believe the one of the far right is my Buff Orpington. The darker one I believe is my Black Australorp. And the other light one is likely my Barred Plymouth Rock. But even if I'm wrong, all of them are "brown laying breeds." Some brown layers lay more or less brown than others. I've seen pictures of eggs collected from single-breed flocks that are all sorts of different shades.