CHick--
THe eggs from blue shellx brown shell will give an olive green, it could be very pale olive to medium olive. I have many hens from EE x RIR/BR roosters that are very pale olive green commonly referred to as green. If you cross a EE with a marans ( chocolate paint) , the eggs are a darker olive. I expect the cuckoo marans to give a light olive as my FBCM x EE give a medium olive. All very pretty. ( cuckoo marans have a much lighter coating than the FBCM; BCM have the darkest paint)
I can use the olive egger hen and breed back to a FBCM and the eggs will be even darker for those that make an olive egg. Remember in this later generation the egg colors will be a variety of colors, not all will be the dark olive green.
Ok so in essence there is no way to make a sex linked olive egger per say darn it that would be sooo cool