Black Copper Marans typically lay the darkest eggs, although much improvement in egg color has been made in the other color varieties, such as the Blue Coppers, Wheatens, and Cuckoos. Buy your birds from a reputable breeder, and ask to see the color of eggs their hens are laying, and how long they hold onto the color. Color can fade by a couple of shades within the laying season, and typically, the first week of eggs will be the darkest once they get going. My egg color needs improvement, but my girls usually lay a consistent 5+-6 color egg, and they pretty much stay within that color range for the laying season. I have some girls that lay large eggs, and one who lays a jumbo egg with some regularity, that is usually a double-yolker! If you are not concerned with showing or selling breeding stock, then shop around for the darkest layers. If you want birds that also conform to the SOP, well, then you are going to have to do some major research and shopping, as there are quite a few faults within this breed! Also, if you are expecting heavy egg laying, this is not the breed for you. These birds tend to be "slackers" as far as I'm concerned, as far as egg productivity goes! 