this is what I would do in after effects:
Curves > these settings (change them depending on input footage) https://i.imgur.com/UAguiGU.jpg (photoshop curves, you won’t get the spectrogram in after FX) – What I did there was: I pushed the blacks to be lighter and decontrasted the image(top right). Added a bit of reds to the highs. Took out a bit of green and blue from the blacks and that’s it.
Hue/Saturation > Saturate the colors a bit
Brightness contrast > Bring up brightness a bit, bring down contrast
Here’s what I got: https://i.imgur.com/9I7VtME.jpg
I think this is the effect you’re looking for
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