We're working on this painting taken at Davidsonville Park near my home. The sky is very pale and the water as well. I combined cerulean blue and cadmium red to get a more gray sky. We used 3 values in the trees made up of winsor yellow and cobalt blue for the light and mid values and for the dark values we used winsor yellow and ultramarine blue. "A Challenge in Green" I call it!! Some were sick of doing it but that's ok, I think there were some valuable lessons learned in this one!