... Second, Mars appears copper or whitish-orange in color, not a deep red. ... For centuries, Mars has been called the Red Planet because of iron compounds in its soil and rocks. ...
... cycle; and to calibrate and validate data from Mars orbiters for additional types of rocks and soils examined on the ground ... Titan's thick atmosphere appears orange while the high-level haze appears blue. NASA / JPL . April 2, 2004 . ...