Fix raise-missing-from warning in Hex.find()

        try:

            int(color[1:], 16)

        except ValueError:

            raise InvalidHexColor(f'InvalidHexColor: {color}')

        except ValueError as exc:

            raise InvalidHexColor(f'InvalidHexColor: {color}') from exc

        # Extend shorthand #ABC -> #AABBCC, like in CSS

        if len(color) == 4: