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My understanding is that they don't distinguish blue and green as separate colours. Kind of like pink is just light red and not every language has a separate word for pink and red.
I'm here for this, I recently found out that I can't really distinguish shades very well, so pink just looks mostly red and I have a really hard time telling blue from green, but can usually make it out if I look hard enough and get at least 2 guesses.
Either that or my wife got my doctor in on a really intense year long prank.
I think I have this same issue with red/pink and when a color is one or the other in that in-between area. I also do this with blue and green as well, though I feel less so than pink/red. I also have done colorblindness tests myself and do not test as colorblind (either variety).
For the longest time orange was just called yellow-red so it tracks.
Humans didn't really care much about details until lately.
Iirc either Greek or Latin use the same word for hands as they do arms or something like that.
Orange being seen as shades of either red or yellow is also why they're called redheads, it predates the word Orange entering the english language and being a better descriptor of most of the shades in that range of hair colors.
In modern Greek there's still no distinction between arms and hands, or feet and legs.