Just got the results of the DNA test on my puppy and thought that I would share. For reference, Luther's sire is a sable longcoat and his dam is bicolor.
Luther's color: ata/EmEm/kyky/DD/BB
A Locus (Agouti) ata
Determines whether hair pigment is produced in a banded red and black pattern or solid black. Fawn or sable (ay) is dominant to wolf sable (aw) which is dominant to black-and-tan (at), which is in turn dominant to recessive black (a).
E Locus (Mask/Grizzle/Red) EmEm
Controls the characteristic melanistic mask seen in the German Shepherd and Pug as well as the grizzled "widow's peak" of the Afghan and Borzoi. Melanistic mask (Em) is dominant to grizzle (Eg) which is dominant to black (E) and red (e). Dogs that are EE or Ee are able to produce normal black pigment, but its distribution will be dependent on the genotypes at the K and A Loci. Dogs that are ee will be a shade of red or cream regardless of their genotype at K and A. The shade of red, which can range from a deep copper like the Irish Setter to the near-white of some Golden Retrievers, is dependent on other genetic factors including the Intensity (I) Locus, which has yet to be genetically mapped.
K Locus (Dominant Black) kyky
Causes a dominant black coat. Dogs with a dominant KB allele have black coats regardless of their genotype at the A locus; the coat color of dogs homozygous for the recessive ky allele are controlled by A locus. Alleles: KB > ky
D Locus (Dilute) DD
Lightens a black coat to blue and a red coat to buff. A dilute phenotype requires two copies of the recessive d allele.
B Locus (Brown/Chocolate/Liver) BB
Lightens a black coat to brown, chocolate or liver. The brown phenotype requires two copies of the recessive b allele. Red or cream dogs that carry two b alleles remain red or cream but have brown noses and footpads.
Full results here: https://embarkvet.com/dog/lotharvomwilloglen