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 Ganges Chasma.
Orbit Number: 4359 Latitude: -8.7239 Longitude: 313.334 Instrument: VIS Captured: 2002-12-08 08:54
http://photojournal.jpl.nasa.gov/catalog/PIA19210