I don't know where people got the story of Miriam accusing Moses of doing wrong by marrying a black girl (Tzipporah). Unless our books are different, according to the story in my book, Miriam was upset that Moses -in an attempt to stay focused and in tuned to God's incoming messages- abstained from being with his wife. Miriam, feeling bad for Tzipporah and thinking, Moses was doing her wrong, was protesting Moses for not being with his black wife MORE!
Anyway, it was none of her business, and as a result she got leprosy (a skin disease which turns the skin partially white. Its said to come as a result of lashon hara -evil speech.)
Somehow the story got twisted into Miriam protest Moses for being with black Tzipporah.
Although there are some color things I do wonder about. such as:
Why was the wicked Laban -the one who tricked Jacob into marrying Leah- why was he called Laban? which means white? Was he the one white dude??
There were others who were called "cush" which means black. The only one I remember at the moment is from Psalm, a certain benjaminite.
At any rate, my position is that I think they were mostly a brownish color with some darker and others ligher, but the bulk being brownish. I also think some people with an agenda (whites wanting to justify slavery, or black wanting to discredit whites) try to make these people a definite color. I don't even think color was an issue way back then.
Anyway, just stuff on my mind.