this post was submitted on 03 Aug 2023
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IR stand for Infrared, a regime of the light spectrum which lies outside the visible regime. So there aren't any colors; the different IR wavelengths here are represented in grayscale.
It depends on how the image was captured. I have a camera I converted to "full spectrum" by removing the IR/UV cut filter. It can still collect visible light, no problem, and you can use various filters to utilize whatever wavelengths you want.
That said, given the amount of noise, this looks like something that was taken with a standard camera and a long exposure through something like a Hoya R72 so there probably isn't a color version in this instance unless OP took a separate one.