I haven't used the new Edge, but simply inverting the colors is going to give you a bad time, all your photos will look rather strange. Realistically, it would want to do something quite a bit more complicated than that. On simple websites, this sort of thing works well, but on compicated websites, it's a nightmare.
> I haven't used the new Edge, but simply inverting the colors is going to give you a bad time, all your photos will look rather strange
Try it: the invert is intelligent enough to work in most cases. I think it substracts the background, which is often white/whitish, so you get the normal image but on a black background.
Also, there's an option to not invert pictures if you prefer.