A gradient is a colour or grey tone fill that gradually changes in density across a selected area. In some image-editing programs, it is also referred to as a graduated fill. Various patterns and directions can be applied to create different visual effects.
Gradients are widely used in digital photography, graphic design, and photo editing to create smooth transitions, enhance depth, or add creative colour effects. Understanding how to use gradients allows photographers and designers to control tonal flow and achieve professional, visually appealing results.