static int hi15ToRGBInt_clean(short hi15) {
  int r = (hi15 >> 10) & 0x1F;
  int g = (hi15 >> 5) & 0x1F;
  int b = hi15 & 0x1F;
  double factor = 255.0/31;
  meta-for r also as g, b {
    r = iround(r*factor);
  }
  ret (r << 16) | (g << 8) | b;
}

Began life as a copy of #1035586