There is an interesting color account given for the Moon here, though it is cut-off after page one.

There does seem to be a reasonable chance for an unsaturated hue of brown. If it had more saturation, then there would be less subjectivity to it. The Apollo implanted American flag would not look brown due to the great saturation. This flag also helps color calibrate the surface color, too. However, it helps less than one might think, since only red and blue are known. I can show that flag in its normal color along with your choice of either a bluish-gray surface or a pinkish-gray surface, taken by each of the two astronauts sequentially.

I don't know what all this does for our planetary mosaic. Would Mercury be that similar to the Moon, since both have no atmospheric protection from possible Solar color dillution effects?

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Lighten up! This is a stellar board! Author: duh.

"The Sun, with all the planets revolving around it, and depending on it, can still ripen a bunch of grapes as though it had nothing else in the universe to do..." Author: Galileo supposedly.