Color gradient

In computing, a color gradient specifies a range of position-dependent colors, generally as an alternative to specifying a single color. For example, many window managers allow the screen background to be specified as a gradient. The colors produced by a gradient vary continuously with position, producing smooth color transitions.

Linear gradients

A linear color gradient is specified by two points, and a color at each point. The colors along the line through those points are calculated using by linear interpolation, then extended perpendicular to that line.

Circular gradients

A circular gradient is specified as a circle which has one color and a focus (usually at the center of the circle) which has another. Colors are calculated by linear interpolation based on distance from the focus.

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