There is no seven colored rainbow

Author: janesix ,

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  • janesix
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    Newton invented "indigo" as a rainbow color because he thought it would be more "esoteric" to be seven colors instead of the six there really are. Indigo is either a very dark purple or blue, not a color on it's own.

    There is a real mystery color though, and it is brown, which is not represented by the rainbow.

    There are four ways to make brown:

    The mixture of all three primary colors, red yellow and blue

    The mixtures of secondary colors

    orange-green
    orange-purple
    green-purple

    There you go, you learned something new today
  • drafterman
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    Any color is merely an artificial label assigned to some range of wavelengths of light (or combination therein). Light does not divide itself into colors. So the rainbow has exactly as many colors as we want it to have.
  • Discipulus_Didicit
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    --> @drafterman
    Actual rainbow colors:

    Very light red
    Light red
    Red
    Dark red
    Very Dark red
    Light orange
    Orange
    Dark orange
    Light yellow
    Yellow
    Dark yellow
    Light green
    Green
    Dark green
    Light blue
    Blue
    Dark Blue
    Very dark purple
    Dark purple
    Purple
    Light purple
    Very light purple
  • Polytheist-Witch
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    Polytheist-Witch
    You should credit your posts like this. Word for word from another site. Indigo is a color on the blue scale. It can describe the color move from blue to purple accurately. 
  • RationalMadman
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    --> @janesix
    In many ways brown is the inverse of gray/grey, despite both seeming 'dull' to our eye.
  • FLRW
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    --> @Polytheist-Witch
    At Justus Liebig University Giessen in Germany, psychologist Roland Fleming studies how we see objects around us.
    “The only reason Newton came up with ‘indigo’ is because for occult reasons he believed there must be seven basic colours that come together to make white. It certainly has little to do with physics and a lot more to do with the relationship between perception and language,” Fleming said.
  • FLRW
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    --> @drafterman
    rainbow is caused by sunlight and atmospheric conditions. Light enters a water droplet, slowing down and bending as it goes from air to denser water. The light reflects off the inside of the droplet, separating into its component wavelengths--or colors. When light exits the droplet, it makes a rainbow.
  • Polytheist-Witch
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    --> @FLRW
    Yeah, wasn't talking to you. 
  • janesix
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    --> @Polytheist-Witch
    huh?