On: All RGB colors in one image

[JosephRedfern]

I'd guess closer to zero... as I understand it, the visible light spectrum is continuous rather than discrete.

https://en.wikipedia.org/wiki/Continuous_spectrum

[twoodfin → JosephRedfern]

There's a limit to the ability of the human eye to distinguish similar colors. That limit means that each "point" color in the image can be considered to span some range of the visible spectrum.

[JosephRedfern → twoodfin]

Very true - but I suppose that'd be answering a different question! What if you were writing software for a tetrachromatic organism?