COLORS inheritance
Chinchilla:

THE CHINCHILLA GENE
The C series (called chinchilla) 
  The genes found at this locus are basically color lightening modifiers.
  These gene do not effect Black colored dogs, but effect all other colors, brown, sable, tan pointed and buff. 
 What you normally see, that can be easily identified, as part of this group of genes, is buff, that varies from near red to golden to buff to silver.
  There are at least three genes in this locus (location). They seem to work together. Hence the variability of buffs.
They are :
C - non lightening dominant.

ch - this gene is responsible for what we normally think of as buff.

xch (ce)- extreme chinchilla, recessive to C and ch, known as silver

 

This is approximately  the way the chinchilla series of genes works.
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