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Contrast is used to place opposing elements like colors, tones, directions in a painting to create visual interest. The area of greatest contrast, such as between light and dark colors, should be located at the center of interest to draw the viewer's eye. When using contrast on webpages, it is important not to overuse different fonts, colors, lightness and darkness levels, or images, as too much contrast throughout can destroy unity and be difficult to view easily. Contrast should be carefully considered and maximum contrast placed strategically.