I have three marans pullets and only one is laying dark eggs, so those are the only eggs I am hatching, even though the other two hatched out from dark eggs themselves, they are not laying dark. They are a result of a F1 cross between lines of two well known and respected breeders, so some genes may not have been complimentary to the others on the two light laying hens. Luckily for me, I kept three roosters, which all my friends said was overkill for someone with only three pullets. Now I have three different looking roosters to rotate with the growing flock. One is too brown, one is too black and one is just right. That way I can manipulate feather color while working on egg color at the same time. All three roos came from very dark eggs, but all are the same F1 cross, so I am sure I will have many pullets that do not lay like what they hatched out from either. Feed, rake, brood, hatch, feed, rake, brood, hatch.... and just pick the best. That is what I am doing.