Function lighter

pattern/canvas.js:821–828

(clr, step)

}

function lighter(clr, step) {
    /* Returns a copy of the color with a lighter brightness.
     */
    if (step === undefined) step = 0.2;
    var hsb = _rgb2hsb(clr.r, clr.g, clr.b);
    var rgb = _hsb2rgb(hsb[0], hsb[1], Math.min(1, hsb[2]+step));
    return new Color(rgb[0], rgb[1], rgb[2], clr.a);
}
    
var darken  = darker;
var lighten = lighter;