Dilute calico describes a coat, not a breed: a white cat with patches of soft blue-gray and cream, the pastel version of black, orange and white. The paler shades come from two copies of a recessive dilution gene. Because the orange color gene sits on the X chromosome, nearly all calicos are female, and the rare males are usually sterile.
Most dilute calicos you'll meet in Marietta are domestic shorthairs or longhairs, though the pattern also turns up in Persians, Maine Coons and many other breeds. Coat length sets the grooming routine: weekly brushing for shorthairs, more often for longhairs. Shedding is moderate. Age and temperament tell you far more than color does, and with a typical lifespan of 12 to 18 years, this is a long commitment.