Recently I found out about discoveries of Aurora phenomena on Mars. In theory these differ from the colors of the Auroras on Earth. While there still hasn't been high resolution or any images of it, there have been many artist renderings of what they may look like. See https://www.google.com/search?q=mars+aurora
The images below are not the full images of the actual drawings I created. These are just my samples, ideas, and colors of the Auroras that exist on Mars.