If you can find a marans roo (BCM OR WHEATER OR CUCKOO) that came form a very dark egg is the best way to get the darkest olive laying hen from you EEs that lay blue eggs.
Other brown egg roosters will work but wont be as dark olive egg.
Other brown layers will not work, they'll just create normal green laying Easter Eggers. I find a common, rising belief lately is that any brown layer x blue/green layer = olive egger. Originally the term Olive Egger came from crossing DARK brown layers with blue/green layers and continuing from there with whatever path you choose but preferably not back to the blue/green layer.
Also Cuckoos won't work too well, as their eggs are often poor in color unless you got some nice/rare dark laying lines.
Araucanas, Polish, Shamos
Araucanas, Polish, Shamos
