ok I've not seen purple eggs except in a easter basket, LOL but for blue you'll need an ameraucana or araucana or a cream legbar. You can get blue or green from an easter egger, and I do believe pink come from what is considered to be an easter egger also, and for darker greens those are called olive eggers.
Some of these that breed and cross different varieties can be more specific than me, I just know what I read on the internet
Some of these that breed and cross different varieties can be more specific than me, I just know what I read on the internet
