The THEMIS camera contains 5 filters. The data from different filters can be combined in multiple ways to create a false color image. This image from NASA's 2001 Mars Odyssey spacecraft shows a part of the large sand sheet on the floor of Proctor Crater in Noachis Terra. Orbit Number: 57787 Latitude: -47.7327 Longitude: 30.2888 Instrument: VIS Captured: 2014-12-23 21:29 https://photojournal.jpl.nasa.gov/catalog/PIA21538