Isolated Color

When an element of color is seen against a larger background of neutral color, the effect is called isolated color. This is a useful technique for isolating the subject and creating interest. The eye is drawn to the subject by the isolated element of color in the same way it is drawn to a highlight. On a gray day, white can substitute for color against a subdued color background (white against desaturated color).

Although the image here is an example of isolated color, it is also an example of color harmony, since the browns and tans of the concrete, composed of stone aggregate, harmonizes (shares similar tones) with the leaf. The colorful element should fill a significant percentage of the frame to be effective.