Who lays the dark brown ones?

[GRAM49]

Of Black Australorps, NH Reds and Barred Rocks, who lays the darkest brown eggs. We cannot catch who lays what, but love the big, dark eggs and would like to get some more of those chicks if we can figure it out.

We also have BO's but they are older and we know they lay the off-white eggs.

Any ideas?
Thanks, Gram

 

[Happy Chooks]

Pics?

I say it's the NH Reds. My BR lays a light brown egg. I don't know about Australorps though.