I have always wanted to read 6,200 words about color! Sorry, that’s a lie. But I did skim it and really admired the very pretty illustrations. Dan Hollick is a saint for writing and illustrating this chapter in his living book called Making Software, a reference manual for designers and programmers that make digital products. From his newsletter:
I started writing this chapter just trying to explain what a color space is. But it turns out, you can't really do that without explaining a lot of other stuff at the same time.
Part of the issue is color is really complicated and full of confusing terms that need a maths degree to understand. Gamuts, color models, perceptual uniformity, gamma etc. I don't have a maths degree but I do have something better: I'm really stubborn.
And here are the opening sentences of the chapter on color:
Color is an unreasonably complex topic. Just when you think you've got it figured out, it reveals a whole new layer of complexity that you didn't know existed.
This is partly because it doesn't really exist. Sure, there are different wavelengths of light that our eyes perceive as color, but that doesn't mean that color is actually a property of that light - it's a phenomenon of our perception.
Digital color is about trying to map this complex interplay of light and perception into a format that computers can understand and screens can display. And it's a miracle that any of it works at all.
I’m just waiting for him to put up a Stripe link so I can throw money at him.

Making Software: What is a color space?
In which we answer every question you've ever had about digital color, and some you haven't.