diff --git a/src/Semi.Avalonia/Controls/ComboBox.axaml b/src/Semi.Avalonia/Controls/ComboBox.axaml
index 2b3fa59..5ced6b2 100644
--- a/src/Semi.Avalonia/Controls/ComboBox.axaml
+++ b/src/Semi.Avalonia/Controls/ComboBox.axaml
@@ -12,7 +12,7 @@
                 <ComboBoxItem>BBB</ComboBoxItem>
                 <ComboBoxItem>CCC</ComboBoxItem>
             </ComboBox>
-            <ComboBox Width="100" PlaceholderText="Select">
+            <ComboBox Width="100" PlaceholderText="Select" PlaceholderForeground="Red">
                 <ComboBoxItem>AAA</ComboBoxItem>
                 <ComboBoxItem>BBB</ComboBoxItem>
                 <ComboBoxItem>CCC</ComboBoxItem>
@@ -44,6 +44,7 @@
         <Setter Property="HorizontalAlignment" Value="Left" />
         <Setter Property="VerticalAlignment" Value="Top" />
         <Setter Property="MinHeight" Value="{DynamicResource ComboBoxDefaultHeight}" />
+        <Setter Property="PlaceholderForeground" Value="{DynamicResource ComboBoxSelectorPlaceHolderForeground}"/>
         <Setter Property="Template">
             <ControlTemplate TargetType="ComboBox">
                 <DataValidationErrors>
@@ -65,9 +66,8 @@
                             HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
                             VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
                             TextTrimming="CharacterEllipsis"
-                            Foreground="{TemplateBinding Foreground}"
+                            Foreground="{TemplateBinding PlaceholderForeground}"
                             IsVisible="{TemplateBinding SelectionBoxItem,Converter={x:Static ObjectConverters.IsNull}}"
-                            Opacity="0.3"
                             Text="{TemplateBinding PlaceholderText}" />
                         <ContentPresenter
                             Name="ContentPresenter"
diff --git a/src/Semi.Avalonia/Themes/Dark/ComboBox.axaml b/src/Semi.Avalonia/Themes/Dark/ComboBox.axaml
index 8294f86..caa4516 100644
--- a/src/Semi.Avalonia/Themes/Dark/ComboBox.axaml
+++ b/src/Semi.Avalonia/Themes/Dark/ComboBox.axaml
@@ -1,5 +1,6 @@
 <ResourceDictionary xmlns="https://github.com/avaloniaui" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
     <StaticResource x:Key="ComboBoxSelectorBackground" ResourceKey="SemiColorFill0" />
+    <StaticResource x:Key="ComboBoxSelectorPlaceHolderForeground" ResourceKey="SemiColorText2" />
     <StaticResource x:Key="ComboBoxSelectorPointeroverBackground" ResourceKey="SemiColorFill1" />
     <StaticResource x:Key="ComboBoxSelectorFocusBackground" ResourceKey="SemiColorFill1" />
     <StaticResource x:Key="ComboBoxSelectorPressedBackground" ResourceKey="SemiColorFill2" />
diff --git a/src/Semi.Avalonia/Themes/HighContrast/ComboBox.axaml b/src/Semi.Avalonia/Themes/HighContrast/ComboBox.axaml
index af69299..8c328d4 100644
--- a/src/Semi.Avalonia/Themes/HighContrast/ComboBox.axaml
+++ b/src/Semi.Avalonia/Themes/HighContrast/ComboBox.axaml
@@ -1,5 +1,6 @@
 <ResourceDictionary xmlns="https://github.com/avaloniaui" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
     <StaticResource x:Key="ComboBoxSelectorBackground" ResourceKey="SemiColorWindow" />
+    <StaticResource x:Key="ComboBoxSelectorPlaceHolderForeground" ResourceKey="SemiColorGrayText" />
     <StaticResource x:Key="ComboBoxSelectorPointeroverBackground" ResourceKey="SemiColorHighlightText" />
     <StaticResource x:Key="ComboBoxSelectorFocusBackground" ResourceKey="SemiColorWindow" />
     <StaticResource x:Key="ComboBoxSelectorPressedBackground" ResourceKey="SemiColorHighlightText" />
diff --git a/src/Semi.Avalonia/Themes/Light/ComboBox.axaml b/src/Semi.Avalonia/Themes/Light/ComboBox.axaml
index 4df35d1..ceafd18 100644
--- a/src/Semi.Avalonia/Themes/Light/ComboBox.axaml
+++ b/src/Semi.Avalonia/Themes/Light/ComboBox.axaml
@@ -1,5 +1,6 @@
 <ResourceDictionary xmlns="https://github.com/avaloniaui" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
     <StaticResource x:Key="ComboBoxSelectorBackground" ResourceKey="SemiColorFill0" />
+    <StaticResource x:Key="ComboBoxSelectorPlaceHolderForeground" ResourceKey="SemiColorText2" />
     <StaticResource x:Key="ComboBoxSelectorPointeroverBackground" ResourceKey="SemiColorFill1" />
     <StaticResource x:Key="ComboBoxSelectorFocusBackground" ResourceKey="SemiColorFill1" />
     <StaticResource x:Key="ComboBoxSelectorPressedBackground" ResourceKey="SemiColorFill2" />