code: function CMYK_TO_RGBA() {
          var c = this.c();
          var m = this.m();
          var y = this.y();
          var black = this.b();
  
          var r = 1 - Math.min(1, c * (1 - black) + black);
          var g = 1 - Math.min(1, m * (1 - black) + black);
          var b = 1 - Math.min(1, y * (1 - black) + black);
          return kolor.rgba(r * 255, g * 255, b * 255, this.a());
      }
docs: Naively converts CMYK color to RGBA.