The blue sky scattering is more obvious when the line of sight passes through more atmosphere.
Oceans appear deep blue essentially for the same reason.
Cloud tops of course appear a bright white. One can test the color faithfulness of the film by noting pictures of the space craft which include colored scenes. There are many pictures of sunsets and sunrises which show much sharper demarcation and dispersion of sunlight by our atmosphere. This also produces the very oblate moonrise seen in one of the pictures. The later Apollo missions provide many photographs from orbit around the moon and on the lunar surface.