Whilst the breed started with foundation cats of a natural
landrace from
Russia, the Russian Blue is
selectively bred and
pedigreed in all major
cat fancier and breeder organisations. This means that all Russian Blue cats are
purebred cats with a formally
registered ancestry. By the late 1970s, the Russian White and Russian Black colours were accepted by cat fanciers in Australia (
ACF) as well as in South Africa and now also in the United Kingdom (
GCCF) as Russian cats (in different classes). However, the
CFA,
FIFe,
TICA, and
WCF do not recognise any colour variation other than blue for the Russian Blue.
Colourpoints This blue coat colour is the dilute expression of the black gene. However, as dilute genes are recessive ("d") and each parent will have a set of two recessive genes ("dd") two non-Colour-Point Carrier (non-CPC) Russian Blues will always produce a blue cat. Due to the breeding with Siamese after World War II, there are
colour-point genes in the RB lines. If two carriers are bred together, then they will produce a litter of mixed colours—solid blue or blue-point, similar to a Siamese. People call these CPC cats "colour-point", "whites" or "pointed" Russians. In most registries, one cannot register, breed or show a colour-point Russian. These colour-point (blue-point) cats are called Colour-Point-Russian Blue (Blue Point Russian Blue) or more informally as Pika Blu (or pika blue) cats and have the same general characteristics as the Russian Blue cats.
Non-Russian Blue lines Short hair and a darker slate-greyish blue colour is often seen in random-bred cats, which are not related to this breed of pedigree registered cats. Mislabelling a cat as a Russian Blue can affect the breed and increase the cat population. Russian Blues should not be confused with British Blues (which are not a distinct breed, but rather a
British Shorthair with a blue coat as the British Shorthair breed itself comes in a wide variety of colours and patterns), nor the
Chartreux or
Korat which are two other selectively bred naturally occurring breeds of blue cats, although they have similar traits.
Popularity The breed is considered relatively rare. In 2024, 2370 British Blue kittens—representing approximately 2.5% of their total registrations—were registered with the
FIFe, one of the major global
cat registries. == Characteristics ==