Audio clip of David Scott description lunar topography from orbit.
July 29, 1971
079:13:57 Scott: And Houston. We're over Mare Crisium at the present time, and the sights are really striking. I guess some of the interesting things we've noticed is the variation in albedo from white to dark gray with many variations of gray in between. And many times, this albedo change appears without any significant change in topography, other than perhaps a - a mountain ridge or a chain or a wrinkle ridge or something, but there are many vari - variations in the albedo all over the surface. I guess our general consensus is that it's gray. We haven't noticed any brown yet.
NASA, “Moon Description,” The Apollo 15 Learning Hub, accessed October 5, 2022, https://apollo15hub.org/items/show/1.