Oil on 1/4" Board, 6"x6". SOLD. I was drawn to these Granny Smith Apples when I saw them in the store. As I may have mentioned in the past, I find mixing green colors challenging. Maybe it's because I only mix yellow and blue and don't use any tube green colors. I am curious to hear how others achieve their greens. I am very happy with the variety of warm and cool greens that make up this subject.