The THEMIS VIS camera contains 5 filters. The data from different filters can be combined in multiple ways to create a false color image. This false color image from NASA 2001 Mars Odyssey spacecraft shows part of Ares Vallis.
Orbit Number: 4482 Latitude: 6.97956 Longitude: 339.713 Instrument: VIS Captured: 2002-12-18 13:46
http://photojournal.jpl.nasa.gov/catalog/PIA19215