I honestly don't find a problem with the colors of the phone when using Google Map or any other apps. However, I know that a black background is best when viewing a bright screen. For example, when you watch movies, you sometimes have the option of dimming the background. When you watch the movie with a black background, the movie itself pops out and looks brighter. That is why movie theaters are very dark! Anyways, I honestly think any color is fine. Remember, you are not going to be staring at your phone the entire way to your location. THATS TOO DANGEROUS. So choose a color that you like!
