LAB is one of the better ways to to start with perceptually uniform spacing of the colors. Also if the path through the color space avoids A and B being near 0, then the gray dead zone problem that this talks about goes away.

There are multiple ways to look at differences in LAB space unfortunately. Each one more mathematically complex, yet more perceptually accurate: http://zschuessler.github.io/DeltaE/learn/

For a ton of useful equations and calculators: http://www.brucelindbloom.com/index.html

It’s a color space designed to be perceptually uniform. So as you blend through colors the saturation appears to stay the same. Check some of the reds and greens in the other color spaces and see how they get really saturated.

https://en.m.wikipedia.org/wiki/CIELAB_color_space

This is another cool tool: https://leonardocolor.io/

You can compare monochromatic scales between various color space interpolations and order them by contrast (great for accessibility work). Lab is from the 70s, the newest one there is CIECAM2 from the 2000s, also looking most natural to my eyes.

Maybe it's not discussed because in CSS it's only supported by Safari (so far): https://developer.mozilla.org/en-US/docs/Web/CSS/color_value...()