What kind of bees do I have?

I was told that the nuc I purchased was a combination of Carnolian and Russian bees. Some seem to be more orange and others are more black -

When I posted this question on the Beemaster forum, the answer was that until all of the mix of bees have been replaced with new baby bees, I won't know what kind of bees I have. After the queen has replaced all of the original bees, I'll be able to tell- if they are the orange bees, they will be Russian, if the black bees, they will be Carniolan.....