The Book of Numbers is the fourth book of Moses. In it we learn that his brother, Aaron, and his sister, Miriam, became upset with him because he married a Cushite, a black woman. Because of this God blasts Miriam with the white sickness, leprosy. From this story, I am inclined to believe that Moses and his siblings were not black.
It its thought that the actual tomb of Joseph, son of Jacob, has been found in a Semitic settlement in Goshen. The statue associated with the tomb has a Semitic hairstyle and red hair, which would indicate a light complexion.
http://www.levitt.com/essays/joseph
Here are Egyptian paintings of Semites, showing a light skin and reddish beard:
http://s1.zetaboards.com/anthroscape/topic/3132122/1/
http://upload.wikimedia.org/wikipedia/c ... Ibscha.jpg
All this indicates to me that Jews at the time of Jesus and Moses had Mediterranean complexions, possibly many with a red tinge to the hair. Egyptians painted Nubians black and themselves a light but redder color than the Semites.