If you want two colors of a property of your gauge to blend into each other in a circular way, apply the Radial Gradient brush element to the property.
To apply the Radial Gradient brush element to a property of your gauge at design time:
Add a Radial Gauge to the Gauges collection.
In the left-hand pane of the Gauges collection editor, click Radial Gauge.
Expand the Dial property.
From the BrushElement drop-down list, select Radial Gradient. This will create a new Radial Gradient brush element.
Expand the newly created BrushElement property, and set the following properties:
CenterColor - Click the drop-down arrow. The color picker appears. On the top, click Web, then select the PeachPuff color.
SurroundColor - Click the drop-down arrow. The color picker appears. On the top, click Web, then select the SandyBrown color.
CenterPoint - 25, 25.
FocusScales - 0,0\.