Documentation for Color

Documentation: http://people.csail.mit.edu/jaffer/slib/Color-Data_002dType.html and "Digital Color Spaces" at the bottom of http://people.csail.mit.edu/jaffer/slib/Color-Spaces.html

To use: (import (slib color))

For more information including compatibility, examples and test cases, see https://github.com/petercrlane/r7rs-libs