Took my time to get through that article attentively. Must admit I only really understand the lower "Usage" part of it.
The HSV - HSL model is used on my classical radio forum to color text with. It does not have the little cubes or quadrants we have here. It gives a large quadrant for 'saturation' and a side bar for 'hue'. To 'make' your color you must combine the two.

I do understand there is a difference in perception and understanding between colored light and colored dyes/pigments (CMYK).
(Painters mostly just use RYB : red , yellow and blue ). The gist of it is all too difficult for a mathematical nitwit. But still, I got some of it. I do understand the hue- saturation principle.
Beautiful article but oh.. maths!