How to set the color for WPF Chart (SfChart) series?

ChartColorModel colorModel = new ChartColorModel();
colorModel.CustomBrushes.Add(new SolidColorBrush(Colors.Red));
colorModel.CustomBrushes.Add(new SolidColorBrush(Colors.RosyBrown));
colorModel.CustomBrushes.Add(new SolidColorBrush(Colors.RoyalBlue));
colorModel.CustomBrushes.Add(new SolidColorBrush(Colors.SaddleBrown));
colorModel.CustomBrushes.Add(new SolidColorBrush(Colors.Salmon));
chart.Series[0].Palette = ChartColorPalette.Custom;
chart.Series[0].ColorModel = colorModel;

<syncfusion:ColumnSeries  ItemsSource="{Binding TestingModel}" XBindingPath="X" YBindingPath="Y1" Palette="Custom">
     <syncfusion:ColumnSeries.ColorModel>
          <syncfusion:ChartColorModel>
               <syncfusion:ChartColorModel.CustomBrushes>
                     <SolidColorBrush Color="Red"/>
                     <SolidColorBrush Color="RosyBrown"/>
                     <SolidColorBrush Color="RoyalBlue"/>
                     <SolidColorBrush Color="SaddleBrown"/>
                     <SolidColorBrush Color="Salmon"/>
               </syncfusion:ChartColorModel.CustomBrushes>
           </syncfusion:ChartColorModel>
      </syncfusion:ColumnSeries.ColorModel>
</syncfusion:ColumnSeries>