def match(self, color: Tuple[int, int, int]) -> int:
        """Find a color from a palette that most closely matches a given color.

        Args:
            color (Tuple[int, int, int]): RGB components in range 0 > 255.

        Returns:
            int: Index of closes matching color.
        """
        red1, green1, blue1 = color
        _sqrt = sqrt
        get_color = self._colors.__getitem__

        def get_color_distance(index: int) -> float:
            """Get the distance to a color."""
            red2, green2, blue2 = get_color(index)
            red_mean = (red1 + red2) // 2
            red = red1 - red2
            green = green1 - green2
            blue = blue1 - blue2
            return _sqrt(
                (((512 + red_mean) * red * red) >> 8)
                + 4 * green * green
                + (((767 - red_mean) * blue * blue) >> 8)
            )

        min_index = min(range(len(self._colors)), key=get_color_distance)
        return min_index
Find a color from a palette that most closely matches a given color.

        Args:
            color (Tuple[int, int, int]): RGB components in range 0 > 255.

        Returns:
            int: Index of closes matching color.
        
rich/palette.py