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Colours of black body radiation. This image was generated using information from http://www.vendian.org/mncharity/dir3/blackbody/UnstableURLs/bbr_color.html. The basic colours are unoriginal and ineligible for copyright, the little input I have is GFDL

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This diagram ignores the brightness of the radiation. all the colours are normalized to full brightness. This is because of the limited range of intensities possible with computer screens. To give a true indication of intensity, if the colour at 1000 were reduced to nearly black, at 10000K the intensity would be so strong as to instantly blind the user.