4. Chinchilla Mottled, cm

Mottled chinchilla is one of the potential tricolor producing genes - when combined with recessive white spotting s/s (or dominant white spotting W). Homozygous and heterozygous with cch it gives mice with areas of both like chinchilla and like cch/c. On nonagouti background this would mean slightly off-black and "stone" mottling. Other dilutions present naturally affect the final colouring. Blue dilution could be quite charming.