This picture shows contrast because it has light and dark colors. The backgrounds the darkest colors and the crayons are the lighter colors. You can focus more on the crayons because of the bright colors that they display.
By another pinner: Recycled Magazine Basket. Started this on a rainy day with a fire going. Decided I didn't need yet another basket. Guess where the folded mess ended up? It went out in a lovely blaze of glory.