I am going to share a couple of links with you that I find very helpful.
There are many colors of Pomeranians. I want to explain a few basic color concepts.
1. sable mean black tips, almost any color can be sabled. Sabled puppies often change a lot between puppyhood and adulthood. A dog that is heavily sabled can be lightly sabled or barly noticably sabled as an adult. No one can garentee the color of a puppy as an adult, exspecially if they are sabled.
2. parti means 50% white, can be a any base color
3. Pibal parti means 90% white with any base color
With that in mind, here is a link to the color chart I refer to when I am figuring out the colors of my own dogs.
Pomeranian colors
http://www.americanpomeranianclub.org/colors.htm
This is the same site, just a direct link to the Pomeranian standards that the American Pomeranian Club and AKC go by.
Pomeranian standards