But scientists use such a range of photographing techniques that the planet can end up a rainbow of colors.
NASA's Mars Reconnaissance Orbiter started circling the planet in 2006, and since then its camera has been busy capturing gorgeous - and scientifically valuable - images of Mars.
That camera, called HiRISE, takes images so detailed scientists can examine the planet's features at the scale of just a few feet.
We combed through the camera's latest update to find some of the most beautiful pictures. Scientists haven't had a chance to dig their teeth into them yet - but when they do, who knows what incredible discoveries they'll make.