code: public void setCircleColor(@ColorInt int color) {
      jsonObject.addProperty(CircleOptions.PROPERTY_CIRCLE_COLOR, ColorUtils.colorToRgbaString(color));
    }
docs: Set the CircleColor property
  <p>
  The fill color of the circle.
  </p>
  <p>
  To update the circle on the map use {@link CircleManager#update(Annotation)}.
  <p>
  
  @param color value for String