Agreed, it's a lot of different sources of information. Color perception and reproduction are deep subjects and many of the results/assumptions are in turn subjective (e.g. dependent on the person). However, this is a lot better than most of the simple presentations I've seen on-line.

One of the noticeable gaps in the article was a discussion of white-point or color temperature even though it starts to discuss illumination. It's critical to realize that our perception of color is influenced by the surroundings and relative to what we accept as white. That's part of why when you're out in the snow with rose glasses on things start to look normal, until you take them off... also why people argue about the blue-black or gold-white dress.