Colors and Patterns
The Merle gene dilutes random sections of a coat to a lighter color, usually grey and a black pigmented dog, leaving patches of the original color remaining. The patches can be any size and can be located anywhere on the dog, unlike the patches on a piebald dog (which are generally confined to the body and head).
Brindle - Dark cross stripes on any solid color or allowed pattern.
Parti - White base with any solid color or allowed pattern. A white blaze is preferred on the head.
Extreme Piebald - White with patches of color on head and base of tail.
Piebald - White with patches of color on head, body, and base of tail.
Irish - Color on the head and body with white legs, chest and collar.
Tan Points - Any solid color or allowed pattern with markings sharply defined above each eye, inside the ears, muzzle, throat, fore chest, all lower legs and feet, the underside of the tail and skirt.
American Kennel Club. (2011, July 12). Official Standard of the Pomeranian.
https://images.akc.org/pdf/breeds/standards/Pomeranian.pdf
Brindle - Dark cross stripes on any solid color or allowed pattern.
Parti - White base with any solid color or allowed pattern. A white blaze is preferred on the head.
Extreme Piebald - White with patches of color on head and base of tail.
Piebald - White with patches of color on head, body, and base of tail.
Irish - Color on the head and body with white legs, chest and collar.
Tan Points - Any solid color or allowed pattern with markings sharply defined above each eye, inside the ears, muzzle, throat, fore chest, all lower legs and feet, the underside of the tail and skirt.
American Kennel Club. (2011, July 12). Official Standard of the Pomeranian.
https://images.akc.org/pdf/breeds/standards/Pomeranian.pdf