def rgb_to_hex(cls, color):
        """
        Convert an ``(r, g, b)`` color tuple to a hexadecimal string.

        Alphabetical characters in the output will be capitalized.

        Args:
            color (tuple): An rgb color tuple of form: (int, int, int)

        Returns: string

        Example:
            >>> SoftColor.rgb_to_hex((0, 0, 0))
            '#000000'
            >>> SoftColor.rgb_to_hex((255, 255, 255))
            '#FFFFFF'
        """
        return '#{0:02x}{1:02x}{2:02x}'.format(
            cls._bound_color_value(color[0]),
            cls._bound_color_value(color[1]),
            cls._bound_color_value(color[2])).upper()