hsbToHex function

String hsbToHex(HSB hsb)

Implementation

String hsbToHex(HSB hsb) {
  var r, g, b, i, f, p, q, t;
  final h = hsb.h / 360;
  final s = hsb.s / 100;
  final v = hsb.b / 100;
  i = (h * 6).floor();
  f = h * 6 - i;
  p = v * (1 - s);
  q = v * (1 - f * s);
  t = v * (1 - (1 - f) * s);
  switch (i % 6) {
    case 0:
      r = v;
      g = t;
      b = p;
      break;
    case 1:
      r = q;
      g = v;
      b = p;
      break;
    case 2:
      r = p;
      g = v;
      b = t;
      break;
    case 3:
      r = p;
      g = q;
      b = v;
      break;
    case 4:
      r = t;
      g = p;
      b = v;
      break;
    case 5:
      r = v;
      g = p;
      b = q;
      break;
  }
  Function toHex = (double x) {
    var hex = (x * 255).round().toRadixString(16);
    return hex.length == 1 ? '0' + hex : hex;
  };
  return "#" + toHex(r) + toHex(g) + toHex(b);
}