Contrast

Contrast is the difference in luminance or color that makes an object (or its representation in an image or display) distinguishable. It is created by the difference in luminance reflected from two adjacent surfaces.

As an example, the polar bears and the snowy background are similar in intensity levels and colors, making them low in contrast. Conversely, the rock behind the polar bears stands out because it is high in contrast compared to the rest of the scene.