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View submission: Ask Anything Wednesday - Engineering, Mathematics, Computer Science
Sorry, that was meant to be rhetorical. What you just said is incorrect. The CIE chromaticity color space represents all the hues visible to human eyes. The only reason there appear to be duplicates outside the RGB triangle is that you're viewing the diagram on an RGB screen, and the RGB gamut does not span the entire CIE color space. In other words, RGB screens can not display every color humans can see.
If you're interested in the math behind all of this, I highly recommend this video[1]. It explains in great detail why the CIE diagram has such a weird shape, why the RGB color gamut is a triangle, and why no RGB monitor can ever display every possible color, along with much much more.
1: https://www.youtube.com/watch?v=gnUYoQ1pwes
There's nothing here!