Exotic Shorthair — Color Genetics & EMS Calculator

The Exotic Shorthair is the shorthaired analogue of the Persian, differing solely in coat-length genotype (L/- at the Length locus versus l/l in PER), and shares an identical FIFe-approved color and pattern range spanning all B-locus alleles, the complete colourpoint series, the Inhibitor (I) locus silver and golden series, and all tabby pattern variants except ticked. EMS codes for EXO are directly parallel to PER, making the EMS color calculator equally complex for both breeds, and requiring systematic tracking of B-locus recessives (b, bl), dilution (d), colourpoint (cs), and Inhibitor (I) alleles across generations. Feline genetics programs for Exotic Shorthair benefit from Persian pedigree analysis tools, as EXO × PER outcrossing is actively practiced to maintain type, introducing and circulating the same allelic pool.

Exotic Shorthair colour genetics: frequently asked questions

Which recessive colours do Exotic Shorthair cats commonly carry?
Identical to PER: chocolate (b), cinnamon (bl), dilution (d), and colourpoint (cs) are all present and accepted as recessives. EXO × PER matings produce longhaired offspring (l/l) which must be registered as PER. Many EXOs carry the longhair allele (L/l) from PER outcrossing programs. Inhibitor (I) locus silver and golden series alleles are common.
What colour restrictions apply to the Exotic Shorthair breed standard?
Ticked tabby (25) is not a recognized pattern in EXO (mirroring PER restriction). Dominant White (W) is accepted. Amber (e) is not listed for EXO in FIFe standard. No base color exclusions apply. EXO offspring that are l/l (longhaired) from EXO × EXO or EXO × PER matings must be registered as PER, not EXO.
Which coat patterns are typical for the Exotic Shorthair?
Classic (22) is the most prevalent tabby pattern. Mackerel (23) and spotted (24) occur. Silver (I/-) series including chinchilla (11) and shaded (11) are highly popular. Golden (i/i + A/-) series is well-established. Colourpoint EXO (cs/cs) are accepted and coded with the 33 suffix.

Popular EMS Colors

EXO aBlue (solid)
EXO ns 11Black Silver Shaded (Chinchilla Exotic)
EXO ny 11Black Golden Shaded
EXO b 22Chocolate Classic Tabby
EXO n 33Seal Colourpoint (Colourpoint Exotic)
EXO fBlack Tortie (solid)

Calculate Colors for Exotic Shorthair

Free online cat color genetics calculator. Select the breed and appearance of the sire and dam to predict kitten coat colors, patterns and probabilities based on feline color genetics.

Sire (Father)
Dam (Mother)

Enter the appearance of both parents to calculate color predictions.

Related pages and tools

Cattery Management SoftwareCat Color CalculatorKitten Name GeneratorCattery Name GeneratorPricingExotic Shorthair Breed Weight Charts