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StrangeTangerine1525 t1_jds57sz wrote

The only time Mars has a blue sky is when the image is in false color in order for scientists to see how rocks would look like in Earthlike lighting. Mars atmosphere always has at least some high altitude dust in it that makes the atmosphere at the very least a kind of light tan. On average the atmosphere is very dusty though so it tends to look almost the color of rust.

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