There is no Wikipedia on African Graphic Design!!!
A history of African art (not graphic design contrary to the title) is:
http://guity-novin.blogspot.nl/2010/03/history-of-graphic-design-african-art.html
And interesting websites with artists are:
- http://africandigitalart.com/tag/william-santiago/
- http://africandigitalart.com/category/artist/
- Indaba: http://www.designindaba.com
A Google search for African typefaces tend to be rather kitsch zebras and unusable. Not the typefaces more commonly used in Africa – these are the common Adobe and Microsoft ones. But African designers have used these with colours in slightly different ways that I have yet to properly analyse.
Some examples from an NGO brochure in Kenya (I unfortunately do not know the designer).
Textile design gives possibilities for different colour schemes:


