Genetics 101
I agree with an earlier post. She appears to be a buff orpington and black orpington cross. The leg color is correct for the cross. The bird has white skin and dark shanks. The extended black allele is adding black to the shanks. She looks like she carries dermal melanin;which she would have picked up from either side of the cross. Buff birds sometime carry dermal melanin but they also carry a gene that dilutes the dermal melanin- it is just like they do not have the dermal melanin gene. According to the standard, black orpingtons should not carry dermal melanin.
Check the bottom of the foot- it should be white. If the bottom of the foot is blue she is carrying dermal melanin; if the bottom of the foot is white her feet are black because of the extended black allele.
PS Edit. The comb in one picture looks wide and rose like but then the other pictures look single?????? One of the birds, with a high degree of probability, was a black orpington. If the other parent was a wyandotte it would have to be carrying dark brown and also be laced. I still think the bird is an orpington x orpington offspring.
Tim