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I want to create a color spectrum image for a project. How do I create an image like this in photoshop?color spectrum

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up vote 5 down vote accepted

I was able to create a near replica in photoshop by using a rainbow gradient left to right.

And then creating 2 layers- one with black to transparent gradient in the bottom and white to transparent gradient on top.

That did the trick I think.

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You can pull the same trick in other color spaces to obtain different spectra. –  Emre Dec 20 '12 at 20:01

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