THE THREE COAT COLORS FOR TRUE LABRADOR RETRIEVERS ARE BLACK, YELLOW, AND CHOCOLATE ONLY! THE LABRADOR RETRIEVER BREED STANDARD ONLY ALLOWS BLACK, YELLOW AND CHOCOLATE AND ANY OTHER COAT COLOR IS A DISQUALIFYING FAULT.
Frances O Smith, DVM, PhD Chair, Labrador Retriever Club, Inc. Genetics Committee

Over the past few years a limited number of breeders have advertised and sold dogs they represent to be purebred Labrador Retrievers with a dilute or gray coat color—hence the term “silver labs.” The AKC has accepted some of these “silver labs” for registration. Apparently, the rationale for this decision is that the silver coat color is a shade of chocolate. Interestingly, the original breeders of “silver” Labradors were also involved in the Weimaraner breed. Although we cannot conclusively prove that the silver Labrador is a product of crossbreeding the Weimaraner to a Labrador, there is good evidence in scientific literature indicating that the Labrador has never been identified as carrying the dilute gene “dd.” The Weimaraner is the only known breed in which the universality of “dd” is a characteristic.
