EEs come in all skin colors available(EEs not being a standardized "breed" they do come in slate shanks), beside this info comes "straight from the horse's mouth"(John Blehm and Mike Gilbert), and unless you have a more credible source, is best leave it at that.
Breeding exclusively for the trait would be the best rout, if this means culling better type hens, so be it. That is if you can't get your hands on better blue hens outside of your flock
White skinned Easter eggers are uncommon exceptions-- all of the original South American stock from which they are derived had yellow skin and most of the breeds used in crosses to get Easter eggers involved yellow skin breeds like Leghorn and Rhode Island red, layer breeds. I just have my doubts about Easter eggers and Leghorns being the sole progenitors of a white skinned breed, especially one that is heavier than both progenitors normally are. Plus I've read John Blehm say different things about the origins of Ameraucanas, with hints that brown egg laying breeds were used in the original crosses. Whatever the truth may be, I find it interesting to speculate on how the breeders got the results they did and why they chose to go for a white skinned breed in the first place.
