Priests, Ministers and Rabbis all favor black as the main color of their ritual garb. Scientifically speaking, color is energy. The colors you see are the ones which are reflected and not the ones absorbed. Therefore, what appears to be white, which is the culmination of all colors in the light spectrum, is actually reflecting all colors and absorbing none. What appears to be black, is absorbing all colors and reflecting none.
Many Witches feel that wearing black attracts and holds more natural energy.
Neither are Wiccans or those in other pagan paths. Witches can be either men or women. Men and Women alike can be Witches, Wiccans or pagans. People are generally drawn to Wicca and other pagan paths for several reasons. Many women feel left out of more mainstream religions because of the lack of feminine divinity.