modified some styles

src/Shared/HandyControl_Shared/Themes/Styles/ProgressButton.xaml

@@ -7,12 +7,11 @@
     </ResourceDictionary.MergedDictionaries>
 
     <Style BasedOn="{StaticResource ProgressButtonBaseStyle}" TargetType="controls:ProgressButton">
-        <Setter Property="Background" Value="{DynamicResource DefaultBrush}"/>
         <Setter Property="Foreground" Value="{DynamicResource PrimaryTextBrush}"/>
         <Setter Property="BorderThickness" Value="1"/>
         <Style.Triggers>
             <Trigger Property="IsMouseOver" Value="True">
-                <Setter Property="Background" Value="{DynamicResource DarkDefaultBrush}"/>
+                <Setter Property="Background" Value="{DynamicResource SecondaryRegionBrush}"/>
             </Trigger>
             <Trigger Property="IsPressed" Value="True">
                 <Setter Property="Background" Value="{DynamicResource BorderBrush}"/>