An OK(LCH) Palette Deck

see this on github Based on the OKLAB / LCH colourspace by Björn Ottosson outlined here, and inspired by many other colour pickers like this one. Was supposed to be modelled around a DJ deck, what with the two decks and the mixer in the middle, and the sans-serif font reminded me of Raw Data Feel / Endless.

TODO - [ ] add input to vary step number in the palette - [x] add a bisection method for finding fallback colour. also have an option to clamp the cursor to the uppermost chroma - [x] added clamp functionality, just need an option to turn off or on - [ ] add extra palettes on the side (chroma variable) and along the bottom - [ ] apply fallback check for slider changes