def rgb(red, green, blue):
    """
    Return the string HTML representation of the color
    in 'rgb(red, blue, green)' format.

    :param red:   0 <= int <= 255
    :param green: 0 <= int <= 255
    :param blue:  0 <= int <= 255

    :return: str
    """
    assert isinstance(red, int)
    assert 0 <= red < 256

    assert isinstance(green, int)
    assert 0 <= green < 256

    assert isinstance(blue, int)
    assert 0 <= blue < 256

    return 'rgba(%d, %d, %d)' % (red, green, blue)