What gender is this black Cuckoo Maran?

[JulietsMomma]

I bought pullets from Rural King about 3 weeks ago. They are getting bigger and this one looks different from my other 3. I'm worried they sold me a rooster. Can anyone tell?

 

[The Moonshiner]

Too young to tell but it might look different because that's blue not black

 

[JulietsMomma]

Too young to tell but it might look different because that's blue not black

My others are black (as in the color). Is it possible this one got mixed in and is blue? I was worried I had a rooster lol

 

[The Moonshiner]

Unless the color in you pic is extremely off that is blue.
Idk why it was in that bin or anything.