Tetra DCTLs with inversion and black point controls. Also a very mediocre pseudo-HSV version.

Check out the others:

• https://github.com/calvinsilly/Tetrahedral-Interpolation
• https://www.juanjosalazar.com/color-science
• https://github.com/EmberLightVFX/Tetrahedral-Interpolation-for-Fusion
• https://github.com/xavijulez/Tetrahedral-Interpolation-DCTL
• https://github.com/npeason/Tetra-DCTLOFX