Sex Linked- Olive Egger Hatching Egg

This will be  first generation cross of blue and black copper marans over cream legbar pullets.  Hatching eggs will be blue but the sex linked females will lay an olive egg.  They will be visually blue or black feathered.  Males will have a spot on their heads and grow out with barring.  Females will have minimal to no spot and will grow out solid.