For anybody who hasn't marked it on their calendar, a reminder that at this time next week you're not far off what could be a fantastic lunar eclipse. The Harvest Moon will be at lunar perigee, i.e., its closest to Earth, so given a clear sky, it should be quite a sight. It's also a long totality so you'll have a good chance of seeing it.
The color is unpredictable. If Earth blocked all the sunlight, of course we wouldn't see the Moon at all. However some light gets to the Moon through our atmosphere, and that light is reddish. This is why the Moon may look red or brown. However the exact color also depends on the state of the atmosphere in terms of dust and chemical pollutants.
Fred Espenak photographed a
total lunar eclipse in December 1982. It was a very dark eclipse because of dust from the Mexican volcano El Chichon. The dust in the upper atmosphere blocked most of the sunlight.