Since every computer display uses RGB color space, it cannot display most actually spectral colors. Mostly, even their primary colors are far from spectral, for example, sRGB's green.

I'd like to see the actual spectral colors as many as possible. Is there any commercially available reference to them?

EDIT: The reference must: 1) consist of many but discrete colors, 2) be available everywhere and anytime, and 3) specify the wavelength of each color.

  • $\begingroup$ It sounds like you need to use the information in this question ; Visible Light Spectrum to Color Space. $\endgroup$ Jun 14, 2018 at 2:49
  • $\begingroup$ @StephenG Don't tell me I need to stimulate my own pigments directly... An array of LED would be enough. $\endgroup$ Jun 14, 2018 at 2:56
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    $\begingroup$ It's not clear what your actual question is. If you want to see the actual spectral colors, why not just look at a solar spectrum projected onto a white surface? Do you want to know the wavelength of a given spectral color? $\endgroup$
    – PM 2Ring
    Jun 14, 2018 at 3:29
  • $\begingroup$ @PM2Ring That will only work at daytime; see the edit. $\endgroup$ Jun 14, 2018 at 4:24
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    $\begingroup$ I see. Thanks for the clarification. Perhaps a quartz incandescent lamp with a corrective filter and a prism splitting the colors? However, you need a product, not a DIY idea. $\endgroup$
    – safesphere
    Jun 14, 2018 at 5:09

1 Answer 1


For round-the-clock spectral goodnes either go for a cheap full spectum source like an incandescent lamp plus a cheap , usually grating- based, spectroscope with markings; or heavily invest in a full spectrum tunable laser system (they usually tune from 580 to 1xxxnm but an additional frequency doubling crystal will then get you the blues too.


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