Interesting. The Bielefelder eggs I received are equivilent to a light Marans color. A nice terra cotta color, but who knows what the chcks will lay. I hope as pretty as what they hatched from.From what I have seen of the eggs the best you could hope for is green not olive.... maybe close with some birds but the eggs I have hatched or seen have been just brown. Olive eggers require DARK egg layers like a Marans.