static Color toLineMarkerColor(int gray, Color color) {
    //noinspection UseJBColor
    return color == null ? null : new Color(
      toLineMarkerColor(gray, color.getRed()),
      toLineMarkerColor(gray, color.getGreen()),
      toLineMarkerColor(gray, color.getBlue()));
  }
static Color toLineMarkerColor(int gray, Color color)