On the color black in Egypt:
http://www.egyptianmyths.net/colors.htm
In ancient Egypt, black (kem) was a symbol of death and of the night. Osiris, the king of the afterlife was called "the black one." One of the few real-life people to be deified, Queen Ahmose-Nefertari was the patroness of the necropolis. She was usually portrayed with black skin, although she was not a negro. Anubis, the god of embalming was shown as a black jackal or dog, even though real jackals and dogs are typically brown.

As black symbolized death it was also a natural symbol of the underworld and so also of resurrection. Unexpectedly perhaps, it could also be symbolic of fertility and even life! The association with life and fertility is likely due to the abundance provided by the dark, black silt of the annually flooding Nile. The color of the silt became emblematic of Egypt itself and the country was called "kemet" (the Black Land) by its people from early antiquity.

Black pigments were created from carbon compounds such as soot, ground charcoal or burnt animal bones.