I believe Araucana have somewhat different ancestry than EEs and Amercaunas. There are several different breeds in South America that lay blue eggs. Some have beards and some are rumpless and have the ear tufts. You probably already know this but to me it's interesting how all of this came about. It's funny because in the 70s to me an Araucana was what is now called an Easter egger. And now everyone is calling Easter eggers Ameraucanas. Same birds, different names. I don't think it will ever be entirely straightened out because the hatcheries are hooked on misnaming Easter Eggers, heaven knows why.I raised and eventually showed Araucana in the 70s.
Never had issue with egg color. All mine laid blue eggs.
Back then we were trying to deal with their lethal gene. I had previously raised Japanese and knew about their lethal gene and bred short legs to long legs. At the time it was thought Araucana lethal gene was linked to them being rumplesss so we all bred rumpless to tailed.