New Post: change DateTimeUpDown background OnMouseOver and IsPressed

<Style TargetType="{x:Type xctk:ButtonChrome}">
         <Setter Property="Background"
                 Value="Red" />
         <Setter Property="Template">
            <Setter.Value>
               <ControlTemplate TargetType="{x:Type xctk:ButtonChrome}">
                  <Grid>

                     <Border x:Name="OuterBorder"
                             BorderThickness="{TemplateBinding BorderThickness}"
                             CornerRadius="{TemplateBinding CornerRadius}"
                             BorderBrush="{TemplateBinding BorderBrush}"
                             Background="{TemplateBinding Background}" />

                     <ContentPresenter Margin="{TemplateBinding Padding}"
                                       IsEnabled="{TemplateBinding IsEnabled}"
                                       Content="{TemplateBinding Content}"
                                       ContentStringFormat="{TemplateBinding ContentStringFormat}"
                                       ContentTemplate="{TemplateBinding ContentTemplate}"
                                       ContentTemplateSelector="{TemplateBinding ContentTemplateSelector}" />

                  </Grid>
                  <ControlTemplate.Triggers>

                     <!-- If button is disabled, not checked, and is rendered normal -->
                     <MultiTrigger>
                        <MultiTrigger.Conditions>
                           <Condition Property="RenderEnabled"
                                      Value="False" />
                           <Condition Property="RenderChecked"
                                      Value="False" />
                        </MultiTrigger.Conditions>
                        <Setter TargetName="OuterBorder"
                                Property="BorderBrush"
                                Value="{DynamicResource {x:Static themes:ResourceKeys.ButtonDisabledOuterBorderKey}}" />
                        <Setter TargetName="OuterBorder"
                                Property="Background"
                                Value="{DynamicResource {x:Static themes:ResourceKeys.ControlDisabledBackgroundKey}}" />
                     </MultiTrigger>

                     <!-- if button is enabled and pressed -->
                     <MultiTrigger>
                        <MultiTrigger.Conditions>
                           <Condition Property="RenderEnabled"
                                      Value="True" />
                           <Condition Property="RenderPressed"
                                      Value="True" />
                        </MultiTrigger.Conditions>
                        <Setter TargetName="OuterBorder"
                                Property="BorderBrush"
                                Value="{DynamicResource {x:Static themes:ResourceKeys.ButtonPressedOuterBorderKey}}" />
                        <Setter TargetName="OuterBorder"
                                Property="Background"
                                Value="Blue" />
                     </MultiTrigger>

                     <!-- if button is enabled, is not checked, the mouse is over, and not pressed -->
                     <MultiTrigger>
                        <MultiTrigger.Conditions>
                           <Condition Property="RenderEnabled"
                                      Value="True" />
                           <Condition Property="RenderChecked"
                                      Value="False" />
                           <Condition Property="RenderMouseOver"
                                      Value="True" />
                           <Condition Property="RenderPressed"
                                      Value="False" />
                        </MultiTrigger.Conditions>
                        <Setter TargetName="OuterBorder"
                                Property="BorderBrush"
                                Value="{DynamicResource {x:Static themes:ResourceKeys.ButtonMouseOverOuterBorderKey}}" />
                        <Setter TargetName="OuterBorder"
                                Property="Background"
                                Value="Green" />
                     </MultiTrigger>

                     <!-- if button is enabled, checked, the mouse is not over, and it is not pressed -->
                     <MultiTrigger>
                        <MultiTrigger.Conditions>
                           <Condition Property="RenderEnabled"
                                      Value="True" />
                           <Condition Property="RenderChecked"
                                      Value="True" />
                           <Condition Property="RenderMouseOver"
                                      Value="False" />
                           <Condition Property="RenderPressed"
                                      Value="False" />
                        </MultiTrigger.Conditions>
                        <Setter TargetName="OuterBorder"
                                Property="BorderBrush"
                                Value="{DynamicResource {x:Static themes:ResourceKeys.ButtonPressedOuterBorderKey}}" />
                        <Setter TargetName="OuterBorder"
                                Property="Background"
                                Value="Blue" />
                     </MultiTrigger>

                     <!-- if button is focused, is enabled, not pressed, and the mouse is not over -->
                     <MultiTrigger>
                        <MultiTrigger.Conditions>
                           <Condition Property="RenderFocused"
                                      Value="True" />
                           <Condition Property="RenderEnabled"
                                      Value="True" />
                           <Condition Property="RenderPressed"
                                      Value="False" />
                           <Condition Property="RenderMouseOver"
                                      Value="False" />
                        </MultiTrigger.Conditions>
                        <Setter TargetName="OuterBorder"
                                Property="BorderBrush"
                                Value="{DynamicResource {x:Static themes:ResourceKeys.ButtonFocusedOuterBorderKey}}" />
                        <Setter TargetName="OuterBorder"
                                Property="Background"
                                Value="{DynamicResource {x:Static themes:ResourceKeys.ButtonFocusedBackgroundKey}}" />
                     </MultiTrigger>

                     <!-- if not rendered normally -->
                     <MultiTrigger>
                        <MultiTrigger.Conditions>
                           <Condition Property="RenderNormal"
                                      Value="False" />
                           <Condition Property="RenderChecked"
                                      Value="False" />
                        </MultiTrigger.Conditions>
                        <Setter TargetName="OuterBorder"
                                Property="BorderBrush"
                                Value="Transparent" />
                        <Setter TargetName="OuterBorder"
                                Property="Background"
                                Value="Transparent" />
                     </MultiTrigger>

                  </ControlTemplate.Triggers>
               </ControlTemplate>
            </Setter.Value>
         </Setter>
      </Style>