It could be that I’m taking the wrong approach. I’m trying to find a setting that changes, or sets the color of shadows from a light source. Does a setting existing in Blender?
Your’e better off using pure black and compositing.
BI has shadow color sliders (Lamp properties, down), Cycles does not have.
Mix a transparent shader with your default shader and use “Is Shadow Ray” as the mix factor. You can set the shadow color by changing the color of the transparent shader.
Excellent - thanks - I will give that a try.