The Red Planet may have a distinct greenish tinge when the first people to see it up close arrive there five years from now.

The nonprofit Inspiration Mars Foundation aims to launch two astronauts on a historic flyby mission around the Red Planet in January 2018. The explorers will be on Mars' night side when they make their closest approach in August of that year, so the mission team is considering outfitting them with some high-tech night vision gear — which would likely cast the Red Planet in a rather green light.

That's provided they ever make it that far.  The more I read about this mission, the flakier it appears.  To read more, click here.