Hey, I’m just hopping on after not being around for a while. It is funny you asked, because I just got my first marans egg yesterday!

I’m not sure exactly where it rates on their scale, but it is dark.
This is the egg
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And here it is with four other brown eggs of various shades. I was honestly worried the top right egg was from one of my marans girls because it is darker then most of my other browns, but now I’m thinking it was from a black sex-link.
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I’m still waiting on two other marans girls to start laying so hopefully their eggs will be just as dark if not darker. So far I’m incredibly pleased with my girls.