This setting will apply a radial gradient to the donut chart. The inner point of the gradient will use the Base Fill Color or Category X Colors (if applicable), and the outer point will be automatically derived from each slice’s fill color to provide a subtle sense of depth and to enhance readability. You can further customize the following settings:

• Slice Outer Opacity
• Gradient Start Location
• Lightness Adjustment
• Hue Adjustment
• Saturation Adjustment