Bicoloration in cats is graded from one to ten with one being completely black and ten being completely white. There are also several patterns with their own names. The cat labelled "bicolor" is the preferred pattern in show-quality bicolor purebred cats. The Cat Registry Fédération Internationale Féline (FIFe) states that for a "standard" bicolor coat to compete in shows: “the color patches must be clearly separated from each other, even in color and harmoniously distributed. At least ½ should be colored, but not more than ¾; the rest is white.” In comparison, The Cat Fancier Organization (CFA) says that “cats with no more than a locket and/or button on chest do not qualify for this color class.”