<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                    xmlns:o="http://schemas.microsoft.com/winfx/2006/xaml/presentation/options">
    
    <SolidColorBrush x:Key="PanelBackgroundBrush"
                     o:Freeze="True"
                     Color="{DynamicResource PanelBackgroundColor}"
                     Opacity="0.8" />
    
</ResourceDictionary>