If you're actually interested in changing your car color, you should could look at wrapping. It's still expensive (thousands last I checked, which was before any measurable inflation took hold), but cheaper than painting and obviously less permanent. I've heard it's better to wrap black/dark vehicles because if the measurement and cuts are a bit off it gets hidden away a lot better than something like red or blue. But could still be an option!

I had a dark gray car many years ago that I wanted to wrap in matte black, but I just never got around to it then ended up selling it.