Function f

public/js/folderManager.js:1206–1210

function hslToHex(h, s, l) {
  h /= 360; s /= 100; l /= 100;
  const f = n => {
    const k = (n + h * 12) % 12, a = s * Math.min(l, 1 - l);
    const c = l - a * Math.max(-1, Math.min(k - 3, Math.min(9 - k, 1)));
    return Math.round(255 * c).toString(16).padStart(2, '0');
  };
  return '#' + f(0) + f(8) + f(4);
}
function lighten(hex, amt = 14) {