Some of my Easter Eggers lay blue eggs. I have also see Ameraucana eggs they too lay some egss that are on the greenish side of blue.
Yes, most hatcheries call their EE's Ameraucana, but thye are the same stock that Ameraucana's are bred from, just bred to a standard where as hatcheries seem to mix about anything (many different breeds) together.
I have some EE's mixed on purpose to lay darker eggs (olive), and some to make crests on them (mixed with Polish). I use mine to enjoy my chickens. I currently have two that are about 3/4 Naked Neck and 1/4 Easter Egger and yes they have naked necks.
Here they are:
