def color_system(self) -> Optional[str]:
        """Get color system string.

        Returns:
            Optional[str]: "standard", "256" or "truecolor".
        """

        if self._color_system is not None:
            return _COLOR_SYSTEMS_NAMES[self._color_system]
        else:
            return None
Get color system string.

        Returns:
            Optional[str]: "standard", "256" or "truecolor".
        
rich/console.py