What is a blue German Shepherd? It must be a french bulldog, malamute, blueberry cross...wrong! A blue German shepherd simply put, is a black German Shepherd where the color is being partially blocked by a double recessive dilute gene. I do not discriminant against any color of shepherd and feel the color does not restrict them from being able to do anything a tradition shepherd could because at the end of the day they are just a black German Shepherd