We talk a lot about contrast in the process of art production, but it's usually mentioned in the context of value. At its core, contrast is about differentiation, making elements separate from one another to bolster visual clarity. In order to stimulate the eye of a viewer, you need that push and pull. If everything is the same, boring right? So taking the notion of contrast further, consider it in the context of not only value, but also contrast of form, scale and silhouette. Think about dynamic color schemes with contrast in hue or contrast in your levels of saturation. Play with contrast in texture and levels of detail too! Bottom line is contrast is not only about value, but about pushing and pulling with all of the tools at your disposal to create amazing visual content that will stimulate and excite your audience.