def METHOD_NAME(percent):
    """Traffic load color
    Returns a RGB-triplet for given load percent starting from green to red.
    Grey color returned when we receive no percent.
    :param percent load in procent [0..100]
    """
    if percent is None:
        return 211, 211, 211
    # range(42,236) = 194 steps with nice colors from traffic_gradient_map()
    step_constant = 194.00 / 100.00
    color_map_index = int(percent * step_constant)
    if color_map_index >= 194:
        color_map_index = 193
    rgb = traffic_gradient_map()[color_map_index]
    return int(rgb[0]), int(rgb[1]), int(rgb[2])