Hi,

You can add the following to your Window.Resources:

<LinearGradientBrush x:Key="GenericBorder" StartPoint="0.0, 0.0" EndPoint="0.0, 1.0">

     <GradientStop Color="#FFCCD3D8" Offset="0"/>

     <GradientStop Color="#FF8C9194" Offset="1"/>

</LinearGradientBrush>

<Style x:Key="CrosshairLineStyle" TargetType="Line">

     <Setter Property="Stroke" Value="{StaticResource GenericBorder}"/>

     <Setter Property="StrokeThickness" Value="1.4"/>

</Style>

Then reference this style in your XamDataChart like this:

<ig:XamDataChart CrosshairVisibility="True" CrosshairLineStyle="{StaticResource CrosshairLineStyle}"/>

Hope this helps,

Marisa