Surprisingly in some languages such as in my mother tongue "Pastho" : we have the same one single word for Blue and Green. let's call it blue.
So we say "Blue like the sky? or blue like the grass"
So we say "Blue like the sky? or blue like the grass"
https://www.thoughtco.com/russian-colors-4776553
And English includes indigo in the ROYGBIV rainbow because of Newton's numerology.
https://nationalpost.com/news/why-the-colour-indigo-is-disap...
Why does the author find it necessary to mock "scientific accuracy at Gay Pride parades"? Especially when the point of the article is that 7 is no more "scientifically accurate" than the gay 6?
I think it's in very poor taste to suggest that to be gay is to be scientifically inaccurate.
The original rainbow flag from Gilbert Baker had 8 symbolic colors.
The history of language is like that, early on a population would have one word for both and then eventually distinguish a line between blue and green and then later start getting more specific shades from there.