Siberian Cat Colors: A Palette With Its Genes Named

Most Siberian color lists are adjective collections. This one is a map. Every color family below carries the gene that builds it. The source is a February 2026 peer-reviewed review, the only comprehensive synthesis of Siberian coat genetics yet published, checked against five registries' own standard documents. And this breed holds one genuine genetic celebrity: a golden color, sunshine, whose mechanism belongs to the Siberian in a way no other breed's palette can claim.

The base palette: black, red, and their dilutes

Siberian color starts from black-based pigment (the B locus, TYRP1). Red is the X-linked O locus. The actual switch, per two 2025 genomic studies, is a small deletion near the ARHGAP36 gene. Because it rides the X chromosome, males are red or not, while two-X females can be both at once: the tortoiseshell weave. The dilution gene (MLPH, a single fully recessive frameshift) softens black to blue and red to cream. That yields the everyday palette: black, blue, red, cream, tortie, blue-cream, each in solid or tabby.

Where the registries genuinely disagree

Chocolate, cinnamon, lilac and fawn are where the paperwork splits. TICA's current standard (revised May 2026) bars them plainly: "chocolate, lilac, cinnamon, fawn and caramel are not allowed." WCF bars them for Siberian and Neva Masquerade alike. CFA excludes chocolate and lavender/lilac as evidence of hybridization. ACF's exclusion list is the widest of the five we read.

The genuine exception is Canada: CCA-AFC's own color tables list chocolate, cinnamon, fawn and lilac at every pattern level, a registry position no other body we read shares. So "can a Siberian be chocolate?" has a real answer. Not at four of the five registries we read; yes on paper in Canada. (A 2026 review described TICA as the one registry NOT excluding these colors. TICA's own May 2026 standard, read directly, now says otherwise. A reminder that standards move and review articles freeze.)

Tabby: four patterns and a forehead M

The agouti gene (ASIP) decides whether hairs are banded. The tabby patterns themselves come from Taqpep (mackerel versus blotched, with spotted best understood as a mackerel variant) and DKK4 (ticked). Siberians show classic, mackerel, spotted and ticked, with one registry quirk: GCCF permits no ticked pattern in the breed. The agouti "M" on the forehead and a pale chin are pattern features, not white spotting. That distinction is worth knowing before reading a pedigree.

Sunshine: the color this breed gave to genetics

The warm, honeyed gold some Siberians wear is not ordinary rufousing, and not the Persian "golden." It is its own mechanism: a recessive variant in the CORIN gene (c.2383C>T, the allele written wbSIB), identified in 2021 by genome-wide association in sunshine Siberians. A second, intensifying variant followed in 2022 (c.839G>A, wbeSIB, "extreme sunshine"). The dominance order runs Wb+ > wbeSIB > wbSIB. British Shorthairs later turned out to carry their own, different CORIN variant for their "copper" look. That confirmed the point: golden mechanisms are breed-specific, and this one is the Siberian's.

The look, per TICA's own standard (rare among registries in naming the gene outright): warm undercoat, lightened tabby marks, an enlarged off-white zone around a pink, un-outlined nose. Recognition travels under three names. TICA says "Corin." GCCF registers "Zolotoy." WCF coded the color "u" in 2017. FIFe's 2025 acceptance is the strictest: provisional, black-based cats only, and requiring a DNA test of the CORIN variant before registration. One caution from the current SERP: a top-ranking competitor page describes this mechanism backwards (as a DARK color added to the hair). The effect is the opposite, a widening of the pale warm band.

Bimetallic: silver and gold at once

Silver is the inhibitor locus: dominant, its causal gene still unidentified at the molecular level despite two competing unpublished lab claims. It suppresses pigment at the hair base. Classical coat genetics assumed silver and golden were mutually exclusive; sunshine Siberians broke the rule. A cat carrying both the inhibitor allele and the CORIN variant wears "silver sunshine," the bimetallic coat: cool silver and warm gold in one hair shaft, recognized by name at ACF and CFA among others.

One practical note from the breeder testing record, labeled as breeder-reported: silver, smoke and bimetallic lines (historically involving Persian outcrosses) typically test HIGH on allergen levels. Worth knowing if the allergy question is what brought you to this breed. And "dark sunshine," a look breeders describe (golden roots under darker marking), currently rests on a breeder hypothesis about genotype, published nowhere. We name it as exactly that.

White: spotting, dominant white, and an honest gap

White patches and all-white coats are both KIT gene events of different sizes. An insertion causes patchy melanocyte absence (spotting, from lockets to van patterns, with registries drawing the bicolour/harlequin/van percentage lines differently). A larger insertion silences pigment entirely (dominant white). Dominant white is the deafness-linked one. In white, especially blue-eyed cats generally, the same developmental pathway that removes pigment cells can affect the inner ear.

That is why WCF, FIFe and GCCF all require a veterinary hearing certificate before a white cat breeds. The honest Siberian-specific fact: no peer-reviewed study has ever measured deafness prevalence in Siberians specifically. We state that as the gap it is, rather than borrowing a general figure. A white kitten's hearing can be checked objectively (BAER testing): ask the breeder for the certificate rather than a reassurance. And for any concern about a cat you own, something wrong with your cat means call your vet, out of hours an emergency clinic.

Colorpoint, and eye color to check against the coat

The pointed, blue-eyed Siberians have their own page: genetically the same population, one temperature-sensitive allele apart. What belongs here is the eye-color rule a buyer can actually use, stated near-identically by TICA and CCA-AFC. Pointed cats MUST have blue eyes. Non-pointed cats run green, gold, green-gold or copper. Blue or odd eyes in a non-pointed cat are only accepted with solid white or with-white coats. A straight-coated, blue-eyed brown tabby "Siberian" is either carrying the separate, PAX3-linked dominant blue eye trait or mislabelled. Either way, ask questions. All kittens are born blue-eyed; adult color settles later.

The palette at a glance