You need something that is luminescent and glows with a soft light. This can be the case with both light and dark colors. You can see some of the high end lexus ls430s have this kind of paint. However, you don't want to over-do it and get a bass boat metallic flicker. Typically, luxury cars do well with a dark shade of paint with smoked windows, or conversely a lighter egg-white with mirrored tint.
The "color-changing" paint is interesting, and would certainly draw a lot of attention. Regardless what type you choose, the quality of the paint and its application will be far more important than its exact color.