Get the color of a property in a UserControl, set the Brush of a T:System.Windows.media.GeometryDrawing property

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WPF

C#5.0

Hi, good day to all.


I already have the desired function working, what I want is to be able to change the color of the image that is generated by a resource that serves me for all the buttons.


I already have the resource as well:

<DrawingImage x:Key="Atras">
    <DrawingImage.Drawing>
        <DrawingGroup>
            <GeometryDrawing Brush="{StaticResource scbSecundario}" Geometry="M18.701601,11.259598 L24.610021,11.259598 13.995821,21.873798 42,21.873798 42,26.047437 13.995821,26.047437 24.610021,36.661637 24.53408,36.740394 18.779225,36.740394 8.9530749,26.913694 5.9999977,23.960617 z M24,2.2574263 C11.991908,2.2574263 2.2574253,11.991908 2.2574255,24 2.2574253,36.008094 11.991908,45.742574 24,45.742574 36.008092,45.742574 45.742572,36.008094 45.742572,24 45.742572,11.991908 36.008092,2.2574263 24,2.2574263 z M24,0 C37.254835,0 48,10.745167 48,24 48,37.254834 37.254835,48.000001 24,48.000001 10.745166,48.000001 -4.7683714E-07,37.254834 1.5870416E-14,24 -4.7683714E-07,10.745167 10.745166,0 24,0 z"/>
            <!--<GeometryDrawing Brush="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type u:BotonConImagen}, Path=ColorImagen}" Geometry="M18.701601,11.259598 L24.610021,11.259598 13.995821,21.873798 42,21.873798 42,26.047437 13.995821,26.047437 24.610021,36.661637 24.53408,36.740394 18.779225,36.740394 8.9530749,26.913694 5.9999977,23.960617 z M24,2.2574263 C11.991908,2.2574263 2.2574253,11.991908 2.2574255,24 2.2574253,36.008094 11.991908,45.742574 24,45.742574 36.008092,45.742574 45.742572,36.008094 45.742572,24 45.742572,11.991908 36.008092,2.2574263 24,2.2574263 z M24,0 C37.254835,0 48,10.745167 48,24 48,37.254834 37.254835,48.000001 24,48.000001 10.745166,48.000001 -4.7683714E-07,37.254834 1.5870416E-14,24 -4.7683714E-07,10.745167 10.745166,0 24,0 z"/>-->
        </DrawingGroup>
    </DrawingImage.Drawing>
</DrawingImage>

Then I apply a style to the user control:

<Style x:Key="BotonVacio" TargetType="{x:Type u:BotonConImagen}">
    <Setter Property="Focusable" Value="False" />
    <Setter Property="IsTabStop" Value="False" />
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type u:BotonConImagen}">
                <Grid Cursor="Hand">
                    <Image
                        Stretch="Fill"
                        Source="{TemplateBinding Imagen}"
                        Margin="5" />
                </Grid>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

And this is the control already in the user interface:

<u:BotonConImagen ColorImagen="Red" Style="{StaticResource BotonVacio}" Imagen="{StaticResource Atras}" HorizontalAlignment="Left" VerticalAlignment="Top" Width="50" Height="50" Margin="10,16,0,0" Command="{Binding Padre.Padre.ComandoMostrarPrincipal}">
</u:BotonConImagen>

Which works great, the problem is that I need to take the color that I set up in the control using the ColorImagen property, I hope is clear question, and someone can work together with a solution or suggestion to try to achieve the desired objective.

In advance thousand thanks to all.