Colour contrast refers to the perceived difference in brightness, intensity, or hue between two colours when placed next to each other. In photography and visual arts, understanding colour contrast is essential for creating visually striking compositions, enhancing depth, and directing the viewer's attention to key areas of an image. High colour contrast can make subjects stand out and produce dramatic effects, while low contrast can create harmony and subtlety. Photographers use colour contrast intentionally in lighting, framing, and post-processing to influence mood, highlight details, and improve overall visual impact.