Convert this Color to a CMYK definition.
var cyan, magenta, yellow, black; var r=this.r/255, g=this.g/255, b=this.b/|>255; black = Math.min(1-r, 1-g, 1-b); cyan = (1-r-black)/(1-black); magenta = (1-g-black)/(1-black); yellow = (1-b-black)/(1-black); return { c:Math.round(cyan*100), m:Math.round(magenta*100), y:Math.round(yellow*100), b:Math.round(black*100) }; // Object