Selecting the right color paint for a new vehicle or knowing more about your current color will help you understand your paint better. Darker colored paints will typically absorb more light and heat which gives off a deeper reflection then lighter colored paints. The depth and gloss of your paint is a major asset to achieving the maximum shine. Therefore when you complete a full detail on darker colored paint it will generally look better to most people. Conversely black paint also tends to show imperfections such as swirls and contamination build-ups much more than lighter colors. Some vehicles have flat paint while others have metallic flake added to the paint. The metallic flake makes the paint appear to have varying depth. In my opinion the metallic flake takes away from the overall depth and gloss but it helps hide imperfections.
Flat black paint will typically give off the most gloss while metallic silver paint will hide imperfections the most. There is no one universal best color, only the color that works best for you. I recommend darker colored paints to those who enjoy caring for their paint and having that deep shine after a detail. Lighter colors are probably better for those who prefer low maintenance vehicles.