One reason for a simple composition.
This painting was set up in front of an east window on a sunny morning. The edges of the glass shown brightly as orange and those in shadow a deep magenta. The highlight behind the plum was the lightest light and I kept everything else darker. I didn't have a lot of time before the light moved so I had to stick with my first decisions. I knew from the start what interested me and tried keeping with that.
This was really a value study in color. If interested, check out my upcoming workshop on values July 17th.