You obviously want to keep red and blue hues, but invert the luminosity levels. It can be done in systems which allow a little more "what actually is adjusted"-options for the curves adjustment tool than Photoshop. Free systems with it are at least programs GIMP, Krita and Paint.NET. I do not have Affinity Photo available now, so I cannot check it.
Here's the luminosity level inversion done with Curves+ in Paint.NET.
You may want to keep the strongest color in the middle of the graph. That needs a twist in the color inversion curve. The next screenshot is from Krita where the curve is selected to affect Lightness:
Curves+ is one of the free add-ons included in pyrochild effect collection. GIMP and Krita do not need any add-ons.
You may change red and blue to other colors by applying Hue/Saturation shifts. Some programs allow changing one color at a time. For ex. Photoshop has for it hue range limited Hue/Saturation adjustment. Paint.NET needs for the same a free add-on.
All bitmap image editors allow global hue and saturation adjustments. The next example of it is in Krita: