Coat types

Body types


Cream Agouti

Genetics: Agouti plus marten (either double marten or marten plus albino) plus the black eye gene plus two copies of the recessive cream/golden gene.

NFRS Standard: To be a mix of mid grey ticking over a mid cream ground, with no suggestion no suggestion of blue or brown tones. Ticking to be darkest along the […]

Havana Agouti

Havana agouti is currently a colour shown in New Varieties. There was some debate as to whether or not a standard should be accepted for this colour, as commonly these rats look very similar to a cinnamon. However, with some careful selection, they can be made to look distinctly different.

Genetics: Agouti and mink with […]

Russian Buff

Russian Buff has only recently been accepted for a standard, whereas Russian Topaz (it’s agouti counterpart) has been standardised for much longer. This is because a lot of selection is required in order to get a Russian Buff to look visually distinct from a standard Buff. At this time there are not thought to be […]

Russian Dove

AKA dove

Russian Pearl

The Pearl gene can be confusing genetically, since it only has an effect on Mink based rats (and even then, it’s not as predictable as you’d hope it would be). Therefore, the Russian pearl variety is also described as Dove Pearl or Russian Cinnamon Pearl, since it is a combination of Russian blue, Pearl, and […]

Lavender Agouti

Another variety that is not shown in the UK as it is too similar to other existing varieties, so the lack of selection means that this combination can be quite variable. Generally it will vary from looking like a slightly washed out Blue Agouti, to something resembling a Lilac Agouti but with a distinct blue […]


This is not a standardised variety in the UK, as it is not considered distinct enough from other existing varieties. A combination of Blue and Mink, the shade produced is very variable but in general resembles a Lilac with a distinct blue tinge.

Genetics: Non-Agouti with two copies of the English Mink gene and two […]

American Blue

AKA: Sky blue

Sky Blue

The Blue gene can give a whole range of colours, from a pale, powdery blue over a white undercoat to a deep, rich slate down to the skin. The UK standard asks for a deep steel blue, and that dark shade we refer to as “British Blue“.

Although the US standard also refers to the […]


AKA topaz