diff --git a/src/Semi.Avalonia/Controls/CheckBox.axaml b/src/Semi.Avalonia/Controls/CheckBox.axaml
index f171872..3c4f830 100644
--- a/src/Semi.Avalonia/Controls/CheckBox.axaml
+++ b/src/Semi.Avalonia/Controls/CheckBox.axaml
@@ -131,6 +131,7 @@
                 <Style Selector="^ /template/ Border#NormalRectangle">
                     <Setter Property="BorderBrush" Value="{DynamicResource CheckBoxCheckedDisabledBorderBrush}" />
                     <Setter Property="Background" Value="{DynamicResource CheckBoxCheckedDisabledBackground}" />
+                    <Setter Property="Opacity" Value="0.75" />
                 </Style>
 
                 <Style Selector="^ /template/ PathIcon#CheckGlyph">
@@ -150,7 +151,7 @@
                 <Setter Property="Opacity" Value="1" />
             </Style>
 
-            <!--  Checked Pointerover State  -->
+            <!--  Indeterminate Pointerover State  -->
             <Style Selector="^:pointerover">
                 <Style Selector="^ /template/ Border#NormalRectangle">
                     <Setter Property="BorderBrush" Value="{DynamicResource CheckBoxCheckedPointeroverBorderBrush}" />
@@ -158,7 +159,7 @@
                 </Style>
             </Style>
 
-            <!--  Checked Pressed State  -->
+            <!--  Indeterminate Pressed State  -->
             <Style Selector="^:pressed">
                 <Style Selector="^ /template/ Border#NormalRectangle">
                     <Setter Property="BorderBrush" Value="{DynamicResource CheckBoxCheckedPressedBorderBrush}" />
@@ -166,7 +167,7 @@
                 </Style>
             </Style>
 
-            <!--  Checked Disabled State  -->
+            <!--  Indeterminate Disabled State  -->
             <Style Selector="^:disabled">
                 <Style Selector="^ /template/ ContentPresenter#PART_ContentPresenter">
                     <Setter Property="Foreground" Value="{DynamicResource CheckBoxDisabledForeground}" />
@@ -174,6 +175,7 @@
                 <Style Selector="^ /template/ Border#NormalRectangle">
                     <Setter Property="BorderBrush" Value="{DynamicResource CheckBoxCheckedDisabledBorderBrush}" />
                     <Setter Property="Background" Value="{DynamicResource CheckBoxCheckedDisabledBackground}" />
+                    <Setter Property="Opacity" Value="0.75" />
                 </Style>
 
                 <Style Selector="^ /template/ PathIcon#CheckGlyph">
@@ -279,6 +281,7 @@
                 <Style Selector="^ /template/ Border#NormalRectangle">
                     <Setter Property="BorderBrush" Value="{DynamicResource CheckBoxCheckedDisabledBorderBrush}" />
                     <Setter Property="Background" Value="{DynamicResource CheckBoxCheckedDisabledBackground}" />
+                    <Setter Property="Opacity" Value="0.75" />
                 </Style>
 
                 <Style Selector="^ /template/ PathIcon#CheckGlyph">
@@ -298,7 +301,7 @@
                 <Setter Property="Opacity" Value="1" />
             </Style>
 
-            <!--  Checked Pointerover State  -->
+            <!--  Indeterminate Pointerover State  -->
             <Style Selector="^:pointerover">
                 <Style Selector="^ /template/ Border#NormalRectangle">
                     <Setter Property="BorderBrush" Value="{DynamicResource CheckBoxCheckedPointeroverBorderBrush}" />
@@ -306,7 +309,7 @@
                 </Style>
             </Style>
 
-            <!--  Checked Pressed State  -->
+            <!--  Indeterminate Pressed State  -->
             <Style Selector="^:pressed">
                 <Style Selector="^ /template/ Border#NormalRectangle">
                     <Setter Property="BorderBrush" Value="{DynamicResource CheckBoxCheckedPressedBorderBrush}" />
@@ -314,11 +317,12 @@
                 </Style>
             </Style>
 
-            <!--  Checked Disabled State  -->
+            <!--  Indeterminate Disabled State  -->
             <Style Selector="^:disabled">
                 <Style Selector="^ /template/ Border#NormalRectangle">
                     <Setter Property="BorderBrush" Value="{DynamicResource CheckBoxCheckedDisabledBorderBrush}" />
                     <Setter Property="Background" Value="{DynamicResource CheckBoxCheckedDisabledBackground}" />
+                    <Setter Property="Opacity" Value="0.75" />
                 </Style>
 
                 <Style Selector="^ /template/ PathIcon#CheckGlyph">
@@ -468,6 +472,7 @@
                 <Style Selector="^ /template/ Border#NormalRectangle">
                     <Setter Property="BorderBrush" Value="{DynamicResource CheckBoxCheckedDisabledBorderBrush}" />
                     <Setter Property="Background" Value="{DynamicResource CheckBoxCheckedDisabledBackground}" />
+                    <Setter Property="Opacity" Value="0.75" />
                 </Style>
 
                 <Style Selector="^ /template/ PathIcon#CheckGlyph">
@@ -490,7 +495,7 @@
                 <Setter Property="Opacity" Value="1" />
             </Style>
 
-            <!--  Checked Pointerover State  -->
+            <!--  Indeterminate Pointerover State  -->
             <Style Selector="^:pointerover">
                 <Style Selector="^ /template/ Border#NormalRectangle">
                     <Setter Property="BorderBrush" Value="{DynamicResource CheckBoxCheckedPointeroverBorderBrush}" />
@@ -501,7 +506,7 @@
                 </Style>
             </Style>
 
-            <!--  Checked Pressed State  -->
+            <!--  Indeterminate Pressed State  -->
             <Style Selector="^:pressed">
                 <Style Selector="^ /template/ Border#NormalRectangle">
                     <Setter Property="BorderBrush" Value="{DynamicResource CheckBoxCheckedPressedBorderBrush}" />
@@ -512,7 +517,7 @@
                 </Style>
             </Style>
 
-            <!--  Checked Disabled State  -->
+            <!--  Indeterminate Disabled State  -->
             <Style Selector="^:disabled">
                 <Style Selector="^ /template/ Border#RootBorder">
                     <Setter Property="BorderBrush" Value="{DynamicResource CheckBoxCardCheckedDisabledBorderBrush}" />
@@ -523,6 +528,7 @@
                 <Style Selector="^ /template/ Border#NormalRectangle">
                     <Setter Property="BorderBrush" Value="{DynamicResource CheckBoxCheckedDisabledBorderBrush}" />
                     <Setter Property="Background" Value="{DynamicResource CheckBoxCheckedDisabledBackground}" />
+                    <Setter Property="Opacity" Value="0.75" />
                 </Style>
 
                 <Style Selector="^ /template/ PathIcon#CheckGlyph">