A little more work on the (still-early) RAW editor, there is now a gamut plot in OKLCH colour space.
Cranking up the chroma shows the colours falling out of sRGB gamut.

Next step is gamut compression/gamut mapping!

Playing around with Raylib, got a basic node editor in <250LOC.

Added histogram and tonemap visualizer to my camera RAW editor &filmraw. (Odin/OpenGL/Dear-Imgui)

Visualizing the data makes manipulating it a lot easier, so I will add more of these before implementing any more colour editing features.