Invisible Blue: The Color That Ancient People Could Not See

The story of “blue being invisible in history” begins in 1858 when William Gladstone who was mystified as to why the color blue was never refered to in ancient Greek writing. Further explorations have revealed an absence of the mention of the color blue in writing from many other ancient cultures. It was as if the color did not exist.

Is it true that the ancient Greeks could not see blue? - Quora

TIL, that the reason for having Green in Iranian flag is nothing by mistake. It was due to a lexical gap for the word Blue in 19th century Persian. : r/vexillology

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The bizarre myth that Ancient Greeks couldn't see blue

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physiology - Could people perceive the color blue in ancient times

Dendera. Egypt, Ancient egyptian art, Ancient egyptian

Why Ancient People Didn't See the Color Blue

The Blue story- A color which was 'seen and named' much later in