static byte to332(Color color) {
  ret to332(colorToInt(color));
}

static byte to332(int rgb) {
  int r = (rgb >> 16) & 0xFF;
  int g = (rgb >> 8) & 0xFF;
  int b = rgb & 0xFF;
  //ret (byte) (((r >> 5) << 5) | ((g >> 5) << 2) | (b >> 6));
  ret (byte) ((iround(r*7.0/255) << 5) | (iround(g*7.0/255) << 2)
    | (iround(b*3.0/255)));
}