Colour arguments about webcam_demo.py

[neocultureT]

I tried to run webdemo,according to segnet-totorial,I use this command I got this error:
command:
python Scripts/webcam_demo.py --model Example_Models/segnet_model_driving_webdemo.prototxt --weights Example_Models/segnet_weights_driving_webdemo.caffemodel -colours Scripts/camvid12.png

error:
usage: webcam_demo.py [-h] --model MODEL --weights WEIGHTS --colours COLOURS
webcam_demo.py: error: argument --colours is required

I am wondering what arguments webcam_demo.py needs and what's wrong with this command.

Thank you!

[KeunwooPark]

You have to add this argument '--colours Scripts/camvid12.png'.