\u001B (C99)\U00001B (C99)\e\x1B (encoding-dependent)\033 (encoding-dependent)\u{1B} (C++23)\x{1B} (C++23, encoding-dependent)\o{033} (C++23, encoding-dependent)\e\U0000001B\u001B\x1B (encoding-dependent)\033 (encoding-dependent)\u001B\u{1B}\u001B\x1B\1B\00001B=1B%1B