Have you enabled Developer Options in Settings? If so, there are some settings there which can affect your display (Simulate color space, for one), possibly others. I would begin by disabling all Developer options and see if that makes a difference.
Also, make certain that Night Light mode is not enabled (Settings -> Display -> Night Light).
Finally, Brightness level (Settings -> Display -> Brightness level) set too low can certainly have a muting effect on screen colors. I usually keep mine at about 45%.
Yet another option: Settings -> Accessibility -> Color inversion (make sure it is off) and Color correction (likewise).
05-16-2017 04:53 AM