Silver gradation must have black paw pads. The most distinctive features of silver gradation cats are black paw pads and black eyeliner. Only cats that meet these two standards are considered purebred silver gradations. If you want If you buy a purebred silver gradient, you can check the cat’s flesh pads and eyeliner for identification. When mating with other breeds of cats, silvery cats will produce kittens with pink pads. This is a cross-breed silvery cat.