Tom Cat is a very famous cartoon charcter from the show Tom & Jerry and all of its spin-offs. Tom always tries to catch and eat Jerry Mouse and always fails in catching Jerry. Tom is a gray and blue cat. He was originally just gray before he had a major re-design and his color went from just gray to blue-gray, as it is very noticable. His gray-blue color is the color that is still used for him and you can only find his gray version in the original Tom & Jerry cartoons.