The color of the Martian sky depends heavily on how much dust is in the air, but it's generally orange-ish, while a dust-free sky would probably be black! Peopl

The color of the Martian sky depends heavily on how much dust is in the air, but it's generally orange-ish, while a dust-free sky would probably be black! People have scienced the hell out of this. For example see: https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2006JE002687 https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/200... The question of what it would look like to human observers is another matter. A lot of photos from Mars are color adjusted to try to capture what we'd see if we went in person.