It is food for thought. The brown color is due to many genes it is called a polygenic trait. The brown pigment is a hemocyanin that is laid down after the shell is made. Crack open a brown egg and you will find that once you peel off the inner membranes the shell is white inside. The blue oocyanin is laid down as the shell is made and so the entire shell is blue.
Green eggs have the brown pigment laid down over the blue shell.
If you crack open a blue egg and peel off the inner membranes you will expose the blue inside the shell. This is a private posting area. A valid username and password combination is required to post messages to this discussion.