Dilute calico is a coat pattern, not a breed: white with patches of blue-gray and cream, the softer cousin of the black, orange and white calico. The look comes from a recessive dilution gene, and the amount of white ranges from a few spots to most of the body. Nearly all are female, because the orange color gene sits on the X chromosome.
Most dilute calicos are domestic shorthairs or longhairs, though the pattern also shows up in Persians, Maine Coons and other breeds. Size, coat length and energy follow ancestry, so a longhair needs more brushing than a shorthair. Age tells you more than color: kittens are busy, adults tend to be settled. Plan on a 12 to 18 year companion who lives indoors.