code: public void setTextColor(@ColorInt int color) {
      jsonObject.addProperty(SymbolOptions.PROPERTY_TEXT_COLOR, ColorUtils.colorToRgbaString(color));
    }
docs: Set the TextColor property
  <p>
  The color with which the text will be drawn.
  </p>
  <p>
  To update the symbol on the map use {@link SymbolManager#update(Annotation)}.
  <p>
  
  @param color value for String