Here is a description of the colors you may see in puppies:
Red -
Light Red
Medium Red
Dark Red
Abstract Markings -
Tuxedo - may look like they stepped in white paint with some splattered on their chest and nose
Parti - may have more white than even the opposing color
Sable - this color is usually tipped in black and has lighter brown at the base. This is a really interesting color to watch change over time.
Phantom - This is one of my favorite with black and tan markings on the nose and feet with black covering most of the body.
Tri colored - This is a combination of the phantom with white "tuxedo" markings. Quite beautiful.
Sable Tri - This little one may have the sable coloring with white and hints of phantom showing.
Brindle - this color is not common, but shows as sublte brown and black