This is one of my favorite sites, you may enjoy looking through it too - it shows egg color for different breeds
http://www.sagehenfarmlodi.com/chooks/chooks.html
Feather color is not linked to egg color.
True purebred Ameraucanas lay blue eggs. Many mixed breed chickens that are erroneously called americanas will lay other color eggs - these crossbred birds are often called Easter Eggers (or EE's for short).
There are many different breed that lay white and varying shades of brown eggs, from...