title: Wpf Material Design Date-Picker Theme
body: <p>I can successfully build the date picker with the code below.</p>
  
  <pre><code>&lt;Button  x:Name="ButtonOpenDialog" Content="..." IsEnabled="True" 
              Command="{x:Static materialDesign:DialogHost.OpenDialogCommand}" CommandTarget="{Binding ElementName=PopupAddCustom}"/&gt;
  &lt;materialDesign:DialogHost Name="PopupAddCustom" HorizontalAlignment="Center" VerticalAlignment="Center" IsOpen="False"
              materialDesign:DialogHost.DialogOpenedCallback="CalendarDialogOpenedEventHandler"
              materialDesign:DialogHost.DialogClosingCallback="CalendarDialogClosingEventHandler"&gt;
      &lt;materialDesign:DialogHost.DialogContent&gt;
          &lt;Grid&gt;
              &lt;Grid.RowDefinitions&gt;
                  &lt;RowDefinition Height="Auto" /&gt;
                  &lt;RowDefinition Height="Auto" /&gt;
              &lt;/Grid.RowDefinitions&gt;
              &lt;StackPanel Grid.Row="0" Orientation="Horizontal" Margin="0,-2,0,2"&gt;
                  &lt;Calendar x:Name="MaterialCalendar" Margin="-1 -4 -1 0" IsTodayHighlighted="False" SelectedDatesChanged="MaterialCalendar_SelectedDatesChanged"/&gt;
              &lt;/StackPanel&gt;
              &lt;StackPanel Grid.Row="1" Margin="8" HorizontalAlignment="Right" Orientation="Horizontal"&gt;
                  &lt;Button Command="{x:Static materialDesign:DialogHost.CloseDialogCommand}" IsDefault="True" Margin="20 0"
              CommandParameter="1" &gt;OK&lt;/Button&gt;
                  &lt;Button Command="{x:Static materialDesign:DialogHost.CloseDialogCommand}" IsCancel="True"
              CommandParameter="0" &gt;CANCEL&lt;/Button&gt;
              &lt;/StackPanel&gt;
          &lt;/Grid&gt;
      &lt;/materialDesign:DialogHost.DialogContent&gt;
  &lt;/materialDesign:DialogHost&gt;
  </code></pre>
  
  <p>But I want to change foreground color and background color.As shown:</p>
  
  <p><a href="https://i.stack.imgur.com/J7DK8.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/J7DK8.png" alt="enter image description here"></a></p>
  
  <ul>
  <li>Header Background Color To => Gray</li>
  <li>Header Text Foreground Color To => White</li>
  <li>Icon Color To => White</li>
  <li>Month Text Foreground Color To => White</li>
  <li>Main Background Color To => Black</li>
  <li>Main TextForeColor To => White</li>
  </ul>
  
  <p>How can I do that? Is it possible to change without changing original source?</p>