I am using the noise texture to fake the dispersion in a glass shadow. It looks cool, but there is a problem, the noise texture has the purple color, while the purple color is not one of the rainbow colors. How do I get rid of the purple color in the noise texture?

EDIT: I am not sure about whether the rainbow has purple or not, maybe it has. But I would still like to know how to twick a specific color in noise texture. I tried using the Hue/Saturation node and it did not work.


You can put the FAC out of the noise texture into a color ramp, which lets you choose your own color for every range of value (between 0.0 and 1.0) of the texture.

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  • $\begingroup$ Thank you!!! I was so dumb to think that Color Ramp was only used for black and white images hahah. $\endgroup$
    – Eary Chow
    Sep 7 '19 at 17:52
  • $\begingroup$ If useful, please upvote the answer! $\endgroup$ Sep 7 '19 at 21:49
  • $\begingroup$ I tried, but it says "Thanks for the feedback! Votes cast by those with less than 15 reputation are recorded, but do not change the publicly displayed post score." $\endgroup$
    – Eary Chow
    Sep 7 '19 at 21:53
  • $\begingroup$ Ok, thank you and happy blending! $\endgroup$ Sep 8 '19 at 8:39

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