Addendum to the last post: three versions of the same boutonniere. The top is a photograph of the real boutonniere. It is sitting in an unseen vase on a black granite countertop but all you can see is the flower.
In the middle is a color pencil drawing done on black mat board. Although yellows, oranges and reds were used, the black surface changed the appearance of the colors.
On the bottom is a Photoshop® rendering using the “glowing edges” filter.