Coding Challenge 100: Average Coding Challenge Frame

I think the 100th Coding Challenge should be celebrated!
The idea would be to collect a sample of frames from all of the Coding Challenge videos and calculate the average colour of each pixel.

I think the output would be interesting to see. Would the desktop background be recognisable on the left-hand side? Would there be a good chunk of atom-grey? To what extent would the frames of the whiteboard effect the final image?