def METHOD_NAME() -> None:
    global color_scheme, printable
    #
    # We want to colorize the hex characters and only print out
    # printable values on the right hand side.
    #
    color_scheme = {i: H.normal("%02x" % i) for i in range(256)}
    printable = {i: H.normal(".") for i in range(256)}
    for c in bytearray(
        (string.ascii_letters + string.digits + string.punctuation).encode("utf-8", "ignore")
    ):
        color_scheme[c] = H.printable("%02x" % c)
        printable[c] = (
            H.printable(f"{chr(c)}") if pwndbg.gdblib.config.hexdump_colorize_ascii else f"{chr(c)}"
        )
    for c in bytearray(b"\x00"):
        color_scheme[c] = H.zero("%02x" % c)
        printable[c] = H.zero(".") if pwndbg.gdblib.config.hexdump_colorize_ascii else "."
    for c in bytearray(b"\xff\x7f\x80"):
        color_scheme[c] = H.special("%02x" % c)
        printable[c] = H.special(".") if pwndbg.gdblib.config.hexdump_colorize_ascii else "."
    color_scheme[-1] = "  "
    printable[-1] = " "