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this post was submitted on 15 Jul 2023
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No Stupid Questions
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Actually, the answer turns out to be pretty interesting.
The short version is that what colors are considered "distinct" are heavily influenced by culture and Newton, from whom we get ROYGBIV, came from a culture which valued the dye called "indego."
Edit: It also seems Newton thought the number 7 had cosmic significance and thought there ought to be 7 colors.
More info in this short video: https://www.youtube.com/watch?v=bf7WT6TLy8s
I still see people without color-blindness have trouble distinguishing some shades of red/yellow/orange.
How would that arise? There's blues in the sky that are very distinct from the greens of plants. Or are the blue detecting rods (or is it the cones that detect colour?) that new that we can perceive blue more than they could in early recorded history?
You know how some people can tell you the exact shade of two colors that you consider identical? Turns out that giving colors distinct names in our mind makes us way better at seeing the difference and that is how we chop up the color spectrum from an infinite number of colors to seven. You think blue is completely different because you went to school and being able to tell the difference between blue and green was a requirement for you. If the school told you that the sky is a light shade of green and the forest is a dark shade of green you would adjust your brain accordingly.
I guess my point is that all colors are made up by the state and we indoctrinate our children into the government sanctioned system at an early age.
That last paragraph took a turn, haha.
There's a great Radiolab about this, highly recommend a listen.
Bonus: The Colors episode
You can actually see it in modern times. The Himba tribe in Africa doesn't have a concept of the colour blue. There's not even a word for it, as far as they're concerned blue is just a shade of green. To us it seems obvious, the sky is blue and the plants are green but to them it's all different shades of green. It's not a genetic thing, they're seeing the exact same colours as anybody else, their culture just doesn't distinguish between the two colours.
Huh, I had always assumed oranges got their name from the color, not the other way around...
Well it was the 1600s and he was a natural philosopher. Back in those days, all sorts of weird stuff ended up in the books because it fit a certain philosophy. Our modern understanding of empirical science is a relatively new idea.