Doberman Color Genetics: Black, Red, Blue, Fawn, and White

Doberman Pinschers are produced in four standard colours — black and rust, red and rust, blue and rust, and fawn (Isabella) and rust — plus the controversial white, which is associated with serious health problems. Each colour is determined by a simple combination of two loci: B and D.

The Two Core Loci

All standard Doberman colours are controlled by just two loci:

B locus: Black (B/-) vs red/chocolate (bb). A Doberman with at least one B allele will have black base pigment. A Doberman that is bb will have brown/liver base pigment, which appears as rich red in this breed.

D locus: Full colour (D/-) vs dilute (dd). A Doberman with at least one D allele has full, undiluted pigment. A Doberman that is dd has diluted pigment — black becomes blue/grey and red becomes fawn (Isabella).

The Four Standard Colours

Black and rust (B/-, D/-): The classic Doberman — rich black coat with rust (tan) markings above the eyes, on the muzzle, chest, legs, and below the tail. The rust markings are controlled by the A locus (tan point pattern).

Red and rust (bb, D/-): The black pigment is entirely replaced by warm red-brown. The rust markings are the same genetic tan points, but appear on a red base rather than black.

Blue and rust (B/-, dd): Diluting the black produces a grey-blue coat with rust markings. Blue Dobermans are prone to Blue Doberman Syndrome (Colour Dilution Alopecia) — hair follicle dysplasia causing thin, brittle coat and skin problems in the dilute areas.

Fawn and rust (bb, dd): Both dilute AND chocolate — the brown pigment is further diluted to a pale, warm fawn/Isabella tone. Fawn Dobermans have a similarly elevated risk of CDA.

Rust Markings

All Dobermans carry the tan point pattern (at/at at the A locus). This is fixed in the breed — all Dobermans have tan points. What varies is the base colour those points appear on and whether the base is diluted.

White Dobermans

White Dobermans first appeared in 1976 as a result of a mutation that causes a form of albinism — specifically, a loss-of-function mutation in the SLC45A2 gene. White Dobermans are not truly albino but are tyrosinase-positive albinoids. They have cream/white coats, blue eyes, and pink pigment on nose and skin.

White Dobermans are associated with photosensitivity, skin tumours, and behavioural issues. The Doberman Pinscher Club of America actively discourages breeding white Dobermans. All white Dobermans registered with the AKC receive a "Z" prefix on their registration number to flag the white gene lineage. Even non-white Dobermans that carry the white gene (W/w) are tracked.