The https://oklch.com color picker shows another way to represent colors:
- The 3D version looks like a mountainscape of colors
- L(ightness), C(hroma), and H(ue) are orthogonal 2d slices of this mountainscape
---
And this software renders 3D chromaticity (gamut?) diagrams: https://youtu.be/FdFpJFSTMVw?t=679