A dilute tortoiseshell has a softened version of the tortie coat: blue-gray and cream in patches or a fine marbled blend, sometimes called blue-cream. The pastel shades come from a recessive dilution gene a cat must inherit from both parents, and because the patchwork depends on two X chromosomes, nearly all dilute torties are female. Add white markings and the pattern becomes a dilute calico.
Most dilute torties are domestic cats, typically medium-sized at 6 to 14 pounds, with moderate shedding. Coloring says little about personality, despite the "tortitude" folklore, so shy, outgoing, cuddly and independent cats all turn up. Longhaired cats need regular brushing, and a cat's age, history and behavior will tell you far more than its colors.