https://www.todayifoundout.com/index.php/2013/11/color-pink-doesnt-exist-can-see/
Absent from the visible spectrum and neither a wave nor a particle, the color pink is, for many, a scientific enigma:
An interesting article, even though Pointillism and the sewer rat guy make my brain hurt! Still, very cool stuff.
From your link,“Pink is real – or it is not – but it is just as real or not-real as red, orange, yellow, green, blue, indigo and violet.”
Reminds me of a footnote from The Odyssey, Ancient Greeks could see the color blue, but they didn’t consider it to be separate from other colors like green and purple. They didn’t have a word for blue. They called the ocean wine dark.
Also fun discussions on the color brown.