SNOW CORNS exhibit a double-recessive phenotype (appearance).  They are both amelanistic (lacking black) and anerythristic (lacking red) at the same time.  What they have left of their original pigments is varying degrees of yellow, but usually not much.  It's what makes the dorsal blotches stand out so well.  These four animals are all past or present breeders that demonstrate the range of 'normal' across my typical snow corn bloodlines.