Try Viking lander images. Or Opportunity rover images. Both had color calibration tiles on board of known colors, so it is easy to see the NASA fucking with mars colors.

PS: Quick find: Viking lander 1 images

Viking lander 2 image with color calibration tile Bottom right square should be blue, not violet.

Try Viking lander images. Or Opportunity rover images. Both had color calibration tiles on board of known colors, so it is easy to see the NASA fucking with mars colors.

PS: Quick find: https://photojournal.jpl.nasa.gov/mission/Viking?subselect=Spacecraft%3AViking+Lander+1%3A

Try Viking lander images. Or Opportunity rover images. Both had color calibration tiles on board of known colors, so it is easy to see the NASA fucking with mars colors.