French Bulldog colours explained: all 12 rare colours, coats and patterns

Colour is genetics you can test

A French Bulldog's coat is decided by a small number of genes, each sitting at a fixed place on the DNA called a locus. Every dog has two copies of each gene, one from each parent. Many rare colours are recessive, which means the puppy needs two copies to show the colour, and both parents must carry at least one.

Because these genes can be read by a laboratory, a colour should never be a guess. A responsible breeder knows the colour genotype of both parents before a pairing and can tell you which colours are possible in the litter. You can see what we test on our Health page.

Colour names such as pink, husky or koi are trade names, not scientific terms. Breeders and laboratories sometimes use them differently, so always ask for the DNA locus report rather than relying on the name alone.

The loci behind the names

You do not need to be a geneticist, but knowing the main loci makes every colour description easier to read:

• D locus (dilution): two copies (d/d) lighten black pigment to blue-grey and chocolate to lilac.
• B locus and co (chocolate): French Bulldogs can be chocolate through b/b or through the separate co/co variant, often called testable chocolate.
• E locus (cream): e/e hides the base colour in the coat and leaves a cream or white dog. The base colour still shows in the nose, eye rims and pads.
• K and A loci (pattern): decide whether the dog is solid, brindle, fawn or has tan points (at/at).
• M locus (merle): one copy (M/m) gives the marbled merle pattern. Two copies are a health risk.
• L locus (long coat): two copies of a recessive FGF5 variant (l/l) give the fluffy coat.
• F and curl (furnishings and coat texture): add beard, eyebrows and wave or curl.

Dilutes: blue, lilac and isabella

Blue is the simplest dilute: two copies of the dilution gene (d/d) turn black pigment slate grey. It comes in solid, blue and tan, blue fawn and pied.

Lilac combines dilution with chocolate (d/d plus b/b or co/co). The result is a soft silvery lavender, usually with light eyes.

Isabella is the palest of the three. True isabella combines dilution with both chocolate variants (d/d, b/b and co/co), and only a DNA report can confirm it.

Honest note: dilute dogs can develop colour dilution alopecia (CDA), a condition where the hair thins or breaks, often on the back and flanks, sometimes with flaky skin. Not every dilute dog is affected, and there is no reliable DNA test that predicts it. It is managed with gentle skin care rather than cured. Ask a breeder whether related dogs have shown coat problems.

Chocolate

Chocolate French Bulldogs have warm brown pigment in the coat, nose and pads. In this breed chocolate can come from b/b, from co/co, or from both. That is why a chocolate dog's report should show both loci: it decides what the dog can pass on and whether a lilac or isabella litter is possible.

Cream-based colours: platinum and pink

Platinum is a cream dog (e/e) carrying lilac genetics. The coat is pale cream to almost white, while the lilac shows in the nose, eye rims and paw pads.

Pink is a trade name for a cream dog (e/e) on a lilac or isabella base, where very pale skin gives the coat and nose a pinkish tone. It is not albinism: a pink French Bulldog still produces pigment, just very diluted. Because pink and platinum overlap genetically, ask for the full loci report. Our guide to pink, platinum, isabella and lilac compares them side by side.

Honest note: pale skin burns more easily. Cream-based dogs need shade and, on bright days, a pet-safe sun protection on the nose and thinly furred areas.

Merle and merle-based patterns: blue merle and koi

Blue merle is a marbled pattern of grey and silver created by one copy of the merle gene (M/m), often with striking light or odd eyes.

Koi is a trade name for one merle copy combined with brindle or tan points, giving patches that some compare to koi fish.

The rule that matters most: a merle dog should only ever carry one copy. Two copies (M/M, often called double merle) carry a high risk of deafness and eye defects. Responsible breeders never pair merle with merle.

Cryptic merle is the reason testing matters. Some merle alleles are so short that they barely show in the coat, so a dog can look non-merle yet still pass merle on. Modern laboratories size the merle allele and report variants such as Mc, Ma and M. Ask that both parents of a merle litter have a merle sizing result, not just a visual assessment.

Husky

Husky is a trade name for tan points (at/at) on a dilute or chocolate base, giving a mask-like face pattern reminiscent of a Siberian Husky. The exact genotype varies between dogs and breeders, so the DNA report is the reliable description, not the name.

Coat types: fluffy and floodle

Fluffy is a long-coated French Bulldog with two copies of the recessive long-coat variant (l/l). The coat is soft and medium length and can be combined with any colour. Read more in our fluffy French Bulldog guide.

Floodle adds furnishings (beard and eyebrows) and a curly coat gene on top of the long coat. Honest note: furnishings and curl are not part of the traditional French Bulldog, and their presence in the breed is widely attributed to outcrossing in the past. Floodles therefore sit furthest from the breed standard of all the variants here.

Structure, not colour: big rope

Big rope describes a pronounced fold of skin above the nose, not a colour. It is shaped by head structure and can appear on any coat.

Honest note: a heavy nose rope can trap moisture and lead to skin fold irritation, so the fold needs gentle daily cleaning and drying. A visible rope should always come together with open nostrils and good breathing. Ask for the parents' breathing grade, explained in our BOAS guide.

What the breed standard says

The FCI breed standard recognises fawn, brindle and pied (with white). The colours in this guide fall outside it, which means such dogs are not shown at FCI shows. It says nothing in itself about a dog's health or temperament.

Registration of rare colours is handled differently from registry to registry. Our page on pedigree and registries explains the options.

Whatever the colour, the questions should be the same: are both parents DNA-tested, is their breathing assessed, and are risky combinations avoided? Health and temperament should decide a pairing, never colour alone. You can browse every colour in our colour overview.

Choosing a colour responsibly

Start with the dog, not the colour. Pick the breeder first, check the parents' health and breathing results, and only then choose among the colours that are possible in a well-planned litter.

• Ask for the colour loci for both parents, not just a photo.
• For any merle or merle-based pattern, ask for merle sizing on both parents.
• For dilutes, ask whether related dogs have had coat or skin problems.
• For cream-based colours, plan for sun protection.
• Be wary of prices that rise steeply with rarity alone, without health documentation to match.