Mars - in glorious color! - While we have color images of the surface of Mars from previous missions, these missions used filters to take pictures at wavelengths that approximated red blue and green, but the colors were always skewed because the wavelengths were not “exact” (for example, I think the ‘red’ filter took pictures that were right on the edge of infra-red).
This is the first ‘true color’ image taken of the surface of another planet, taken with a camera that works more like a consumer model.
Full resolution image
The image’s page on NASA’s photo journal.