Also, this page discusses color inheritance:
2001 and 2003:
2004: Along with two visiting Eagle Hill dogs,
Two pictures from 2002:
Discussion of color inheritance:
This is "Cutter", a Bi-Color, finishing up an ice cream container.
The only colors of German Shepherds are Sable, Black
and Tan, Bi-Color and Black. Sable is the most dominant
and Black is the least dominant. The Sire will have two color
factors and the Dam will have two color factors. The puppy
will get one of its two color factors from the Sire and one from
the Dam. Thus if a puppy gets a Black color factor from its
Sire and a Bi-Color factor from its Dam, the puppy will be a Bi-Color
in looks and will have one Bi-Color factor and one Black factor,
since as stated above, Bi-Color is dominant over Black.