Help Identifying Breed

[Mak00]

I bought this chicken from IFA in Utah. She was labeled as a Chocolate Orpington, but she's dark gray and not brown at all. She looks similar to my Australorp, but definitely not black. She's darker than the pics I've found of blue australorps. She's almost 14 weeks old in these pics and definitely my biggest chicken out of all the chicks I bought at the same time.

 

[nuthatched]

Hatchery grade chocolate orps are not a strong brown

 

[Mak00]

Hatchery grade chocolate orps are not a strong brown

Thank you! That is good to know!