Here is my code. Try it yourself and you will see the very bad yellow trigger effect. I don't want it to change. I want it to stay the dark blue the entire time.
<Grid>
<Grid.Background>
<RadialGradientBrush>
<GradientStop Color="#FF3A7198" Offset="0.982"/>
<GradientStop Color="#FF365D7A" Offset="0.029"/>
</RadialGradientBrush>
</Grid.Background>
<telerikNavigation:RadPanelBar VerticalAlignment="Stretch" x:Name="radPanelBar" Background="Transparent">
<telerikNavigation:RadPanelBarItem>
<telerikNavigation:RadPanelBarItem.Header>
<TextBlock Text="Workflow Templates" Margin="5 4 5 5" />
</telerikNavigation:RadPanelBarItem.Header>
<ListBox x:Name="lstWorkFlowTemplates"
SelectionChanged="lstTemplates_SelectionChanged"
Background="Transparent"
BorderThickness="0"
IsSynchronizedWithCurrentItem="True"/>
</telerikNavigation:RadPanelBarItem>
<telerikNavigation:RadPanelBarItem>
<telerikNavigation:RadPanelBarItem.Header>
<TextBlock Text="Column Templates" Margin="5 4 5 5" />
</telerikNavigation:RadPanelBarItem.Header>
<ListBox x:Name="lstTemplates"
SelectionChanged="lstTemplates_SelectionChanged"
Background="Transparent"
BorderThickness="0"
IsSynchronizedWithCurrentItem="True"/>
</telerikNavigation:RadPanelBarItem>
</telerikNavigation:RadPanelBar>
</Grid>