http://www.blender.org/api/blender_python_api_current/ As of 10/11 november 2015 we can now link to the current api docs and not be worr...
April 09, 2013
The over operator
For blending between two colors, here's a bit of mixing code:
i tend to like this a little bit more, especially if I can reuse the color lambda
Or another lambda version https://gist.github.com/zeffii/5354106