Hi Phil,
Are you thinking of green and blue? Ameraucanas, Araucanas and Cream Legbars lay blue eggs, Isbars lay green, and Easter Eggers can lay anything depending on what the parents were. (EEs usually have a blue egg layer in their makeup, but sometimes the gene gets lost.)
To reliably get blue eggs, you need to get birds from a breeder, since most from feed stores labeled "Americana" or "Ameraucana" really are EEs.