I like this holiday season. I finally can paint without any business motivations. I submerged myself into the color study again. The image shows my "paint a white object on a white background" project. I used two light sources, one warm and one cool to generate schemes of "warm light cool shadow" and "cool light warm shadow". I am experimenting a color mixing method, which I may call "numerical color matching". With this method, I can accurately achieve a good color solidity, and reduce the color muddiness. I hope someday artists can use science and mathematics to go beyond their experiences to obtain unambiguous understanding and control in their creative processes.