Definitely a blue, with an extra toe, she shouldn't be shown as she will be DQed, but would be fine as a breeder bird. There are not separate genes for 6 toes versus 5. The polydactyly gene causes both. There is a variation where you can get nearly a doubled foot, and it this was the case (it is not) I would say not to use as a breeder.
Obviously, if you have other birds that are equally as good, but without the fault, you would prefer to use them, but if not...