I am intrigued by this stage of the drawing. The masses are laid out and the color is predominately cool. It is almost as if it is a value contrast more than anything else.

Warm and cool is how I recognize/organize color. Value is how I orchestrate it. I have to have both. I don't have a system for using color when I make a pastel. At the beginning of a work the color choice is arbitrary. By chance a warm color may end up being layered over a cool color, or vice-versa.