I hope you'll post more pics as he gets older! I had three hens I thought were cuckoo marans at that age because they all grew 2 white wing feathers (outer two in all cases) and had some white feathers on their feet and legs. But those dropped off and copper hackles grew in around the same time - they ended up being French black copper marans. Perhaps this fellow may yet shift some colors too?They have blue partridge, gold partridge, buff, blue/buff and splash.
I think more colours are accepted over here.