[DannyTN]

It’s because of LSU. Time travelers told the ancients about LSU.

[Redcitizen]

"A dark purple sky is what you'd expect if our planet had been aligned with a dwarf star in past ages. Could that be why dinosaur and hominid remains all have the huge eye sockets they do (and why leftover creatures from those ages like lemurs, tarfsiers, and owls have their huge eyes?"

[Adder]

They didn’t have a word for blue?

https://www.grunge.com/285728/the-real-reason-ancient-people-didnt-see-the-color-blue/

[telescope115]

What a coincidence… my wife this morning is wearing a purple top with a gold necklace that has a miniature Eiffel Tower dangling from it.

She looks very royal!

[yefragetuwrabrumuy]

Tyrian purple: The lost ancient pigment that was more valuable than gold

https://www.bbc.com/future/article/20231122-tyrian-purple-the-lost-ancient-pigment-that-was-more-valuable-than-gold

Tyre is 30 miles north of Tel Shiqmona, where the purple pigment was created from the dried and boiled guts of three species of predatory sea snails.

https://www.nytimes.com/2024/03/05/science/archaeology-tyrian-purple-murex.html

Because each snail yielded little more than a drop of the discharge — a clear, malodorous liquid — some 250,000 were required to produce an ounce of dye, by some accounts.
Purple was labor-intensive, but so widely produced that piles of shells discarded millenniums ago are now geographical features in the region. The dye was also so pricey — worth more than three times its weight in gold, according to a Roman edict issued in 301 A.D. — that its use was reserved for priests, nobility and royalty.