I have created a custom data template for the LegendItemTemplate for my series and I have a legend style specified for the legend itself but I am not sure how to make the Series.Title in the data template use the Series.ActualBrush as its color. Here is my data template. All I did was remove the ItemDataBadgeTemplate.

<DataTemplate x:Key="LegendItemTemplate">
            <StackPanel Orientation="Horizontal" Margin="1" Visibility="{Binding Series.Visibility}">
                <ContentPresenter Content="{Binding Series.Title, TargetNullValue=Series Title}" />
            </StackPanel>
</DataTemplate>

If I add the binding to the legend style I don't have access to the Series object...it uses the control's datacontext which is my custom viewmodel.

Legend style:

<Style x:Key="LegendStyle" TargetType="ig:Legend">
   <Setter Property="Opacity" Value="1" />
   <Setter Property="Background" Value="Transparent" />
   <Setter Property="Margin" Value="0" />
   <Setter Property="BorderThickness" Value="0" />
   <Setter Property="Foreground" Value="{Binding Series.ActualBrush}" />
</Style>

XamDock XAML:

<ig:XamDock x:Name="XamDataChartContainer" Margin="0" Grid.Row="0">
    <ig:XamDock.Height>
        <MultiBinding Converter="{StaticResource WaveCollectionToHeightConverter}">
            <Binding RelativeSource="{RelativeSource Mode=FindAncestor, AncestorType=UserControl}" Path="DataContext.SelectedWaveForms" />
            <Binding ElementName="WaveFormCtrl" Path="Height" />
        </MultiBinding>
    </ig:XamDock.Height>
    <ig:XamDataChart 
        x:Name="xmDataChart"
        Margin="0" 
        CrosshairVisibility="Collapsed"
        VerticalZoomable="False"
        VerticalZoombarVisibility="Collapsed"
        HorizontalZoomable="False"
        HorizontalZoombarVisibility="Collapsed"
        Visibility="{Binding Selected,Converter={StaticResource BooleanToVisibilityConverter}}"
        Background="Black" 
        PlotAreaBorderBrush="Black" 
        PlotAreaBackground="Black"
        Legend="{Binding ElementName=xmLegendOTC}" >
        <ig:XamDataChart.Axes>
            <ig:CategoryXAxis x:Name="xmXAxis" ItemsSource="{Binding WaveData}" Label="{}{TimeStamp}" Stroke="Transparent" MajorStroke="Transparent">
                <ig:CategoryXAxis.LabelSettings>
                    <ig:AxisLabelSettings Location="InsideBottom" Visibility="Collapsed" />
                </ig:CategoryXAxis.LabelSettings>
            </ig:CategoryXAxis>
            <ig:NumericYAxis x:Name="xmYAxis" MajorStroke="Transparent" MinorStroke="Transparent">
                <ig:NumericYAxis.LabelSettings>
                    <ig:AxisLabelSettings Location="InsideLeft" Visibility="Collapsed" />
                </ig:NumericYAxis.LabelSettings>
            </ig:NumericYAxis>
        </ig:XamDataChart.Axes>
        <ig:XamDataChart.Series>
            <ig:LineSeries
                LegendItemTemplate="{StaticResource LegendItemTemplate}"
                Thickness="2" 
                ItemsSource="{Binding WaveData}" 
                Brush="Green" 
                MarkerType="None"
                UnknownValuePlotting="DontPlot" 
                ValueMemberPath="Value" 
                XAxis="{Binding ElementName=xmXAxis}" 
                YAxis="{Binding ElementName=xmYAxis}" 
                Title="{Binding WaveChannelName}" />
        </ig:XamDataChart.Series>
    </ig:XamDataChart>
    <ig:Legend x:Name="xmLegendOTC"
        ig:XamDock.Edge="InsideTop"
        ig:XamDock.HorizontalDockAlignment="Left"
        ig:XamDock.VerticalDockAlignment="Top"
        Style="{StaticResource LegendStyle}">
    </ig:Legend>
    <StackPanel Orientation="Vertical" 
        ig:XamDock.Edge="InsideRight"
        ig:XamDock.VerticalDockAlignment="Top"
        Margin="0,0,0,0" >
        <TextBlock x:Name="Offset" Text="{Binding Offset, StringFormat=Offset: {0}}" 
             Visibility="Visible" Margin="0,0,0,0" />
        <TextBlock x:Name="LastDisplayed" 
             Text="{Binding LastDisplayedTimeStamp, StringFormat=LastDisplayedTimestamp: {0:hh:mm:ss:fff}}" 
             Visibility="Visible" HorizontalAlignment="Left" Margin="0,0,0,0"/>
        <TextBlock x:Name="BufferSize" Text="{Binding BufferSize, StringFormat=BufferSize: {0}}" 
             Visibility="Visible" Margin="0,0,0,0" />
        <TextBlock x:Name="CurrentDrawPosition" 
            Text="{Binding CurrentPosition, StringFormat=CurrentDrawPosition: {0}}" 
            Visibility="Visible" Margin="0,0,0,0" />
        <TextBlock x:Name="LastBufferTime"
            Text="{Binding DebugLastTimeStamp, StringFormat=LastBufferTime: {0:hh:mm:ss:fff}}" 
            Visibility="Visible" Margin="0,0,0,0" />
     </StackPanel>
</ig:XamDock>