Blue Mask
These dogs would be fawn with a black mask if they weren't homozygous for dilution. As you can see dilution affects both red and black pigment resulting in a lightening of the fawn coloration and a "blue" mask.
wikicommons photoThese dogs would be fawn with a black mask if they weren't homozygous for dilution. As you can see dilution affects both red and black pigment resulting in a lightening of the fawn coloration and a "blue" mask.
wikicommons photo