@_checks_drafts(draft3="color", raises=(ValueError, TypeError))
    def is_css21_color(instance):
        if (
            not isinstance(instance, str_types) or
            instance.lower() in webcolors.css21_names_to_hex
        ):
            return True
        return is_css_color_code(instance)
dataset/ETHPy150Open Julian/jsonschema/jsonschema/_format.py/is_css21_color/original