There are two aspects to the earth's shadow. The penumbra, or the outer portion, and the umbra, or inner portion. Some sunlight permeates the penumbra, but the umbra is completely devoid of the sun's rays. Some light, refracted and bent around the earth's atmosphere, will still reach the moon. The moon, in total eclipse, is expected to shine in shades of red.
Predictions call for anything from blood to copper.
The reddish hue is created because the earth's atmosphere filters the blue light from the sun. There may be bands of color noticeable in the transition zone between the penumbra and the umbra. Observers might detect areas of blue and green in this zone. Astronomers expect the northern half of the moon to be a richer red than the southern half. If the earth had no atmosphere to refract sunlight, the moon would appear black in eclipse.