def maximize_channels(old_pixel: tuple, value: int) -> tuple:
    """Return a new pixel that has colour channels set to the larger of value or the corresponding
    colour channel in old_pixel.

    * Assumed that value is positive

    >>> example_pixel = (100, 12, 155)
    >>> maximize_channels(example_pixel, 128)
    (128, 128, 155)
    """
    return tuple([max(chan, value) for chan in old_pixel])