Dilute calico is a coat pattern, not a breed: white with soft patches of blue-gray and cream, the pastel cousin of the black, orange and white calico. The paler shades come from a recessive dilution gene, and the amount of white can range from a little on the paws to most of the body. Nearly all are female, since the orange color gene rides on the X chromosome.
Most dilute calicos you'll meet are domestic shorthairs or longhairs, though the pattern shows up in many breeds. Color says little about personality, so a Jackson adopter might meet a lap cat, a reserved observer or a playful troublemaker. Age, history and how the cat handles a new home are better guides than the coat.