That figure is from the quoted section of my post, not my own text.
I've seen that similar statements, myself, though, that the moon is composed of rather dark material despite its appearing ice-blue-white or golden yellow to us at various times. I don't quite see how that can be, as dark looks dark even in bright sunlight.
As a former psychology major (mostly experimental) I can say with some assurance that light and dark objects are labeled by relative reflectivity or relative luminosity. Against a dark sky the moon would appear light, even if it were made of coal.
Since it appears to be about as reflective as pumice, that's not far off. Imagine the effect on earthly life if it had a surface of beach sand. Full moonlight would be enough to read by easily.