B-Locus — No Dilute
Rojo Chocolate French Bulldog
The deepest, richest chocolate in the breed. b/b without d/d produces a stunning red-brown mahogany coat — the darkest expression of B-locus chocolate.
Model Rojo PairingsWhat Makes a Frenchie Rojo?
Rojo is not a separate gene — it is the visual result of B-locus chocolate (b/b) expressed WITHOUT the dilute gene. No d/d means the brown pigment stays rich and deep.
B-Locus (b/b) — Chocolate
Two copies of the recessive chocolate allele change all black pigment to brown. This is the foundation for every chocolate-based color in Frenchies.
D-Locus (D/D or D/d) — No Dilute
Without the d/d genotype, there is no lightening effect. The brown pigment stays at full strength, producing the deep red-brown mahogany shade known as Rojo.
Rojo vs. Chocolate vs. Lilac vs. Isabella
Four shades of brown, four different genetic formulas. Understanding the progression helps buyers and breeders identify exactly what they are getting.
Breeding for Rojo Chocolate
To produce Rojo puppies, you need b/b at the B-locus and no d/d at the D-locus. Here are the most common pairings.
The DNA Calculator models all loci simultaneously. Enter your exact genotypes for precise probabilities.
Rojo Frenchie Pricing
Rojo commands a premium because of its striking visual appearance. The deep red-brown shade is highly sought after by collectors and breeders.
Pet Quality
$5,000 – $8,000
Rojo with minor flaws. DNA-verified b/b and health clearances.
Breed Quality
$8,000 – $12,000
Rich deep red-brown, full health clearances, AKC registration, proven pedigree.
Rojo + Fluffy
$15,000 – $25,000+
Rojo + longhair gene (L/L). The rarest Rojo combination. Ultra-premium demand.
Model Rojo Chocolate Pairings
Our DNA Calculator covers B-locus and D-locus simultaneously. Predict Rojo, chocolate, lilac, and Isabella outcomes with full accuracy.
Open the DNA CalculatorFrequently Asked Questions
What is a Rojo Chocolate French Bulldog?
A Rojo Chocolate French Bulldog is a dog with the b/b genotype at the B-locus but WITHOUT the dilute gene (D/D or D/d at the D-locus). Because there is no d/d to lighten the brown pigment, the chocolate appears as a rich, deep red-brown — almost mahogany or burnt sienna — rather than the silvery-lilac or pale Isabella shades that dilute creates. Rojo is the darkest expression of B-locus chocolate.
How does Rojo differ from Lilac and Isabella?
Rojo is b/b with no dilute — full-strength chocolate brown. Lilac is d/d + b/b, where the dilute gene lightens the chocolate to silvery-lilac. Isabella is d/d + b/b + co/co, where both dilute and cocoa further lighten the pigment to champagne. Rojo is the darkest, richest brown. Lilac is lighter and cooler. Isabella is the lightest and warmest of the three.
What is the difference between Rojo and regular chocolate?
In the Frenchie breeding world, 'Rojo' is a marketing term used to describe particularly rich, deep red-brown chocolate dogs. Genetically, Rojo is the same as any other b/b dog — the B-locus only has two alleles (B and b). However, some breeders use 'Rojo' to describe dogs that visually show an exceptionally deep, warm brown tone, which may be influenced by modifiers, coat texture, or photography. The term helps buyers understand they are getting a rich-toned chocolate rather than a lighter cocoa shade.
How much does a Rojo Chocolate French Bulldog cost?
Rojo Chocolate French Bulldogs typically cost between $6,000 and $12,000. The price depends on how deep and rich the red-brown tone appears, the dog's structure and pedigree, health clearances, and whether the dog carries additional rare traits like fluffy (L/L) or merle (M). Because Rojo is visually distinctive and highly sought after for its deep mahogany coloring, well-bred examples command premium prices.
Can a Rojo Frenchie carry the dilute gene?
Yes. A dog that looks Rojo (b/b, D/D or D/d) can carry a hidden d allele. If bred to another carrier or a blue/lilac dog, the litter can produce dilute puppies. This is why DNA testing is critical — a Rojo-looking dog that is actually D/d can produce lilac puppies when paired with a d/d mate. Testing for both B-locus and D-locus is essential before any breeding decision.
Is Rojo testable on DNA panels?
There is no separate 'Rojo gene.' Rojo is simply the visual expression of b/b (B-locus chocolate) without dilute (no d/d). Any DNA panel that tests the B-locus will identify whether a dog is b/b, B/b, or B/B. To confirm a dog is truly Rojo (and not a lighter cocoa or co-locus brown), you also need D-locus testing to confirm the dog does not carry d/d. Embark, Animal Genetics, and DDC all test both loci.