A dilute tortoiseshell isn't a breed but a coat: blue-gray and cream in patches or a fine marbled blend, sometimes called blue-cream. The soft shades come from a recessive dilution gene a cat inherits from both parents, and the patchwork depends on the X chromosome, so nearly all of these cats are female. Most are domestic shorthairs or longhairs, though the coloring also appears in Persians, British Shorthairs and Maine Coons.
Coat color says little about personality, despite the folklore of tortitude. Cats with this pattern can be shy, outgoing, cuddly or aloof, so meeting the cat tells you far more than the color. Shedding is moderate, and color doesn't make a cat hypoallergenic. In Indianapolis the care basics are the same as anywhere: a safe indoor home, routine vet visits and a brushing routine that matches the coat length.