After my recent workshop with Carol Marine I'm aware that I need to study values to strengthen my paintings. When she had us mix a 'middle' gray, no one got it. All were too dark. So, I mixed and matched values right on my gray scale value chart. If I squint these grays blend into the backgrounds and that's how you know you're right on. Values and composition are the most important elements of a painting. I also did a color wheel using Prussian Blue, Quinacridone Red and Cad Lemon.