Her egg color depends on who the mother is, doesn't it? If her mother is a BCM you should get dark eggs I would think.
Also keep an eye out for her size, then you would know if she is mixed with a giant.
Oh then she definitely has BCM in her. I used to baby my BCM when they were little because they were so darn cute but now they are so rude, but so prettt and lay the prettiest eggs of all my chickens at the moment. I am sad about them not having super feathery legs though. 🙄😭
I have 4 BCM and they all have a couple to no feathers on their legs. Only one of them has copper on her neck, the other 3 are just black. I would say don't worry!
Your chick does have a sizeable comb, but judging by the fact that it isn't red at 2 months, you may have a pullet.