Cats
Where registries recognise the sex-linked red and sex-linked cream colours
the colour name is prefixed by the words "sex-linked". In the USA, the sex-linked colours are
apparently not recognised to avoid confusion with the sorrel and fawn colours. To the naked
eye (or without the benefit of a pedigree chart), the colours are practically indistinguishable.
It has been thought there were 2 different shades of sorrel red: a bright coppery red and a dark
red characterised by an influential American Abyssinian sire called Champion Dhmahl's
Diablo. Some pale kittens darken to red, while others become deep solid-looking red with
minimum ticking. The dark red is more likely to be chocolate. Chocolate and lilac, along with
the silver series, are considered alien to many North American breeders, but are familiar in
Europe.