exports = function(hsl) {
    var h = hsl[0] / 360;
    var s = hsl[1] / 100;
    var l = hsl[2] / 100;
    var ret = [];
    var t2;
    var t3;
    var val;
    if (hsl[3]) ret[3] = hsl[3];
    if (s === 0) {
        val = round(l * 255);
        ret[0] = ret[1] = ret[2] = val;
        return ret;
    }
    if (l < 0.5) {
        t2 = l * (1 + s);
    } else {
        t2 = l + s - l * s;
    }
    var t1 = 2 * l - t2;
    for (var i = 0; i < 3; i++) {
        t3 = h + (1 / 3) * -(i - 1);
        if (t3 < 0) t3++;
        if (t3 > 1) t3--;
        if (6 * t3 < 1) {
            val = t1 + (t2 - t1) * 6 * t3;
        } else if (2 * t3 < 1) {
            val = t2;
        } else if (3 * t3 < 2) {
            val = t1 + (t2 - t1) * (2 / 3 - t3) * 6;
        } else {
            val = t1;
        }
        ret[i] = round(val * 255);
    }
    return ret;
};
var round = Math.round;

module.exports = exports;