The UFO was first hovering in one are, very bright green and apparent. It then dropped beyond tree line and shot back up in the air. It would change colors from green, then this fluorescent purple, then to blue. It was so noticeable to the naked eye. We watched this for at least 10 minutes if not longer, I have 3 different videos but the color is hard to make out. However, when it would change color you can see it light up and get very bright. It was glowing like a glow stick. Not like lights on it, but the entire thing would take on whatever color and stay that color for some time before getting bright again and changing to another color. Let's be honest, I was frightened.