CMYK color for p5js
#todo: opacity
//cmyk color channel values are 0.0 to 1.0
let a = new Cmyk(1.0, 1.0, 1.0, 0.5 ); //make a new cmyk color
let b = new Cmyk(0.1, 0.5, 0.0, 0.7 ); //make a new cmyk color
a = a.lerp(b);//lerp from one cmyk to another cmyk
let c = a.toRgb(); // convert to rgb format
stroke(c.r, c.g, c.b); // use the new color data