Is it normal to think most people don't see turquoise?

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  • The colour that most people don't see, is 'true' purple.
    It is a non-spectral colour.
    There is no such thing as the "wavelength of purple light"; it only exists as a combination.

    For those interested:

    http://en.m.wikipedia.org/wiki/Purple

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    • I might read that article later. I've noticed a few people who can't differentiate blue from violet and I've always wondered why indigo and violet are both main parts of the spectrum, being so much alike.

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    • Could this be a clue maybe? (For someone smarter than I am)

      http://www.youtube.com/watch?v=OorZcOzNcgE&sns=em

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