I plan on getting some this weekend! Looks like its a cross breed of two types of marans. I am thinking solid and cuckoo to make sex links. I think cross breeding lightens the egg color, but I still want to try it!
https://www.hoovershatchery.com/midnightmajestymaran.html
https://www.hoovershatchery.com/midnightmajestymaran.html