There are only 3 colour codes for reconized pure bred Shiba'sAccording to Canadian law, if a dog isn't registered, it can't be sold as a purebred dog. The breeder needs to have all the puppies either tattooed or microchipped, and submit that information, along with the registration forms, to to the Canadian Kennel Club.
That said, she looks like she might be a purebred, although the Shiba that I've seen have had a foxier face.