TIL most cultures and peoples all over the world have historically had trouble recognizing the color blue

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Hidden Hue: Why Ancient Civilizations Failed to See the Color Blue?

https://www.ancientoriginsunleashed.com/p/hidden-hue-why-ancient-civilizations

Historical evidence reveals that humans possess the remarkable ability to render certain physical appearances invisible if they do not focus on them, including something as fundamental as a color.

Hidden Hue: Why Ancient Civilizations Failed to See the Color Blue?