Dilute calico describes a coat, not a breed: a white cat with patches of soft blue-gray and cream, the pastel cousin of the black, orange and white calico. The dilution comes from a recessive gene, and the amount of white ranges 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 in Des Moines will be domestic shorthairs or longhairs, though the pattern also turns up in Persians, Maine Coons and British Shorthairs. Coat color says little about personality, so you may meet shy, bold, cuddly or independent cats. A cat's age and how she behaves when you meet her are better guides than her patches, and a longer coat means more brushing.