def METHOD_NAME(self, color):
    # type: (str) -> None
    """
    Set the fill color for the arrow as a string (`#RGB`, `#RRGGBB`,
    `#RRRGGGBBB`, `#RRRRGGGGBBBB` format or one of SVG color keyword
    names).
    """
    if self.__color != color:
        self.__color = color
        self.color_changed.emit(color)