The most artificial color on Earth is a green laser, because nature almost never makes pure 520nm light (moultano.wordpress.com)
Three cone types and three display primaries mean every screen is trapped inside a triangle on the CIE chart; pure cyan would need physically impossible 'negative red'. Around 500 bird species exceed sRGB.
The kicker: nothing in nature reliably makes saturated ~520nm light, so a green laser is 'the most artificial color in the world'.
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