Hello Francesco,

If you need to set the color of the ‘pies’ in the radial pie chart you need to set brush and outline for each series you need like this:

series: [{
 name: "Your Series Name",
 title: "You Series Title",
 type: "radialPie",
 angleAxis: "angleAxis",
 valueAxis: "valueAxis",
 valueMemberPath: "valueMemeberPath",
 thickness: 3,
 brush: "blue",
 outline: "dark blue"
}]

In your code you are trying to set brushes and outlines for the markers, but you did not set any markers. By default radial pie chart has no markers. If you need to set markers for your chart you need to set the markerType of your series. The you can set markerBrush and markerOutline.

Attached is a small sample showing how you can achieve both of these. Please check my sample and let me know if this is what you are looking for or if I am missing something.

igDataChartRadialSeries.zip