Wavelength to Color widget

Wolfram Alpha has this cool widget that takes in a value of wavelength in nanometres and shows what color it corresponds to. Check this out at http://www.wolframalpha.com/widgets/gallery/view.jsp?id=23c041a005eec913db5a74171ea72e63 . It also displays properties of the color like frequency, temperature and energy associated with it.


A screen shot of the widget is shown here.

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