For the city Korat in Thailand see Nakhon Ratchasima Korats are a slate blue-grey shorthair domestic cat with a small to medium build and a low percentage of body fat. Their bodies are semi-cobby and surprisingly heavy for their size. They are intelligent playful active cats and form strong bonds with people. Among Korats' distinguishing characteristics are their heart-shaped heads and large green eyes. They are one of a few breeds where individuals have only one color.