A very clear article, written in very accessible language. One potentially relevant thing not covered is the existence of super blacks and super whites, values

A very clear article, written in very accessible language. One potentially relevant thing not covered is the existence of super blacks and super whites, values which (as a budding vfx artist) I often need to consider. These are values which exist in the abstract sence, but not in the perceptual sence. Specifically, values darker than black and lighter than white. They are as good a demonstration as any of the notional nature of color spaces.