السواد والبياض
Blackness and whiteness.
Color is a leading example of an accident. A cloth may remain the same body while its color changes; the body and its qualitative state are not identical.
The classical account begins with black and white and records differing accounts of the remaining colors. The purpose here is not to establish a modern theory of color formation. It is to show how a quality of a body is analyzed as an accident distinct from its bearer.