Apparently "cat" has a somewhat more flexible definition here, ranging from "looks normal but eats glass or fire or something" through "hovers ominously in the bathroom" to... whatever Urthemiaow is.
Ginger is The Best colour for cats; Ser Pounce was a tabby. Grey is also a good colour, as is anything with socks. All cats are good cats, basically, but orange is definitely The Best.