Numberbox Background color not working.

[eykaraduman]

I can't change the background color of "Numberbox" in a "SimpleStackPanel" . How can i fix this issue? Is this a bug?

<ui:SimpleStackPanel Orientation="Horizontal" Spacing="12"> <ui:NumberBox x:Name="Re" Background="Red" Value="{Binding Re, Mode=TwoWay}" Header="Reynolds sayısı, Re :" PlaceholderText="0.00" Width="150" HorizontalAlignment="Left" ValidationMode="InvalidInputOverwritten"> </ui:NumberBox> </ui:SimpleStackPanel>

[TijlGoens]

I also have this exact problem