The HCL– color model is not as common or as widespread as for example the HSV model, but much more suitable for photo editing. It offers several advantages since shadows and highlights possess almost no chroma in this color model. 100% black and 100% white generally have no saturation even if other models allow for this. Even similar colors in various positions as they occur in the upper and lower part of a color cylinder are excluded in the HCL-model.
https://www.picture-instruments.com/products/index.php?lang=en&id=10&cid=
This instantly reminds me about the radar screen in the game Elite ;-)
It looks like you're new here. If you want to get involved, click one of these buttons!