resourcify hard light/dark colours. fixes #221

Author: ButchersBoy

MaterialDesignThemes.Wpf/Themes/Generic.xaml

@@ -430,12 +430,12 @@
                 <Setter Property="Foreground" Value="{DynamicResource SecondaryAccentForegroundBrush}" />
             </Trigger>
             <Trigger Property="Mode" Value="Light">
-                <Setter Property="Background" Value="#FFfafafa" />
-                <Setter Property="Foreground" Value="#DD000000" />
+                <Setter Property="Background" Value="{DynamicResource MaterialDesignLightBackground}" />
+                <Setter Property="Foreground" Value="{DynamicResource MaterialDesignLightForeground}" />
             </Trigger>
             <Trigger Property="Mode" Value="Dark">
-                <Setter Property="Background" Value="#FF37474f" />
-                <Setter Property="Foreground" Value="#DDFFFFFF" />
+                <Setter Property="Background" Value="{DynamicResource MaterialDesignDarkBackground}" />
+                <Setter Property="Foreground" Value="{DynamicResource MaterialDesignDarkForeground}" />
             </Trigger>
         </Style.Triggers>
     </Style>

MaterialDesignThemes.Wpf/Themes/MaterialDesignTheme.Defaults.xaml

@@ -34,6 +34,10 @@
         <ResourceDictionary Source="pack://application:,,,/MaterialDesignThemes.Wpf;component/Themes/MaterialDesignTheme.TreeView.xaml" />
         <ResourceDictionary Source="pack://application:,,,/MaterialDesignThemes.Wpf;component/Themes/MaterialDesignTheme.ValidationErrorTemplate.xaml" />
     </ResourceDictionary.MergedDictionaries>
+    <SolidColorBrush x:Key="MaterialDesignLightBackground" Color="#FFFAFAFA"/>
+    <SolidColorBrush x:Key="MaterialDesignLightForeground" Color="#DD000000"/>
+    <SolidColorBrush x:Key="MaterialDesignDarkBackground" Color="#FF37474f"/>
+    <SolidColorBrush x:Key="MaterialDesignDarkForeground" Color="#DDFFFFFF"/>
     <Style TargetType="{x:Type Button}" BasedOn="{StaticResource MaterialDesignRaisedButton}" />
 	<Style TargetType="{x:Type Calendar}" BasedOn="{StaticResource MaterialDesignCalendarPortrait}" />
     <Style TargetType="{x:Type CheckBox}" BasedOn="{StaticResource MaterialDesignCheckBox}" />