The Difference Between ‘Violet’ and ‘Purple’ (2015)

Re:The Difference Between ‘Violet’ and ‘Purple’ (2015) by frosted-flakes on Tuesday April 02, 2019 @08:24AM (#19553263)

We know exactly how colour blindness works. Usually, the cones all work, but the range of wavelengths they can detect is slightly shifted from normal. Red-green/green-red colour blindness is the most common, and in that case the range of wavelengths that the red and green cones can detect overlaps more than they usually do.

That's how I understand it anyway.

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Re:The Difference Between ‘Violet’ and ‘Purple’ (2015) by jobigoud on Tuesday April 02, 2019 @08:34AM (#19553345)

And that's how we are all colorblind compared to tetrachromats. They have four cone types that don't overlap.

I wish in the future there will be a procedure where you can have cone cells injected to unlock these new colors.

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Re:The Difference Between ‘Violet’ and ‘Purple’ (2015) by frosted-flakes on Tuesday April 02, 2019 @10:25AM (#19554378)

That's not true, actually. Tetrachromats see the same range of electromagnetic wavelengths as everyone else—there's just an extra cone in there that's mostly useless. There's a great video on YouTube called Tetrachromats Don't Have Superpowers that explains it quite well: https://youtu.be/fDoAs0qN7lU

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Re:The Difference Between ‘Violet’ and ‘Purple’ (2015) by OscarCunningham on Tuesday April 02, 2019 @03:24PM (#19557704)

Lots of animals have the useful form of tetrachromacy though.

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Re:The Difference Between ‘Violet’ and ‘Purple’ (2015) by mcv on Tuesday April 02, 2019 @09:19AM (#19553723)

Would we be able to interpret those colours? How will our brain handle and interpret them? It might be like having to learn to see all over again.

It's certainly a cool idea, though. And you don't have to stop at four. Don't butterflies have 6 different cones or something?

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