Stephen Downes

This is a fun game with an interesting point. The idea of the game is to "find your Just Noticeable Difference in colour perception. How small a colour difference can you actually see?" If you're curious, my JND is 0.0054. Surely you can beat that. The math behind the game and behind the the implementation that will land in csskit that's behind all of this is found in this longish paper. It's the driest of subjects made interesting and palatable. Via Data Science Weekly.