Speaking of different colors, my EE laid this aqua-color egg today! It's a strange and beautiful color. She's never laid one this deep blue before. Here are pictures, next to her usual sage-green color egg:
Yes, my Easter Egger (EE) eggshells change from med-light sage green to more light blue, and back.
If yours lays green eggs, she's an EE, not Ameraucana. Ameraucanas lay a blue shell, without the brown pigment overlay that turns the shell color green. It's a genetic thing. EE are a cross...