Sorry this one is blurry.
LEFT: Add darker colors. I simply drew a circle around each center. I used Night Of Navy for the blue, Elegant Eggplant for the purple and Always Artichoke for the green. Add Chocolate Chip to the left, right, under the foliage and to the inside lip of the vase.
RIGHT: On the flowers, blend the darker color from the center to the outside, stop short of reaching the outside so you leave some of the original color showing. Make it nice and dark and intense in color. Blend the Chocolate Chip in a circular motion towards the center of the vase. Make sure to leave the white spot for highlighting in the center.
LEFT: Add little bits of More Mustard to the centers of the flowers and here and there to a few petals and leaves. Further deepen the centers with a hint of Chocolate Chip. Add additional Chocolate Chip to the vase to make it nice and defined. Finally, add an outline of Basic Gray to the entire image.
RIGHT: Blend, blend, blend. Enjoy!