@alchemyalcove/hsl-to-rgb/src/index.js

Convert hsl to rgb

export default function(hsl) {
  var h = hsl[0] / 360;
  var s = hsl[1] / 100;
  var l = hsl[2] / 100;
  var t1;
  var t2;
  var t3;
  var rgb;
  var val;

  if(s === 0) {
    val = l * 255;
    return([val, val, val]);
  }

  if(l < 0.5) {
    t2 = l * (1 + s);
  } else {
    t2 = l + s - l * s;
  }

  t1 = 2 * l - t2;

  rgb = [0, 0, 0];
  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;
    }

    rgb[i] = val * 255;
  }

  return(rgb);
}