The color/transparency sequence transitions in a straight line across the element. The direction is controlled by Rotation and the position by Offset.

The color/transparency sequence radiates outward from the element's center, optionally shifted by Offset. The radius is defined by the average of the element's width and height divided by two, effectively (width+height)/4. Rotation has no effect on a radial gradient.

The color/transparency sequence sweeps clockwise around the center of the element, optionally shifted by Offset. Rotation controls the starting angle of the sweep.