diff --git a/src/Avalonia.Themes.Fluent/Accents/BaseDark.xaml b/src/Avalonia.Themes.Fluent/Accents/BaseDark.xaml
index bf169400f0..9d3df07b14 100644
--- a/src/Avalonia.Themes.Fluent/Accents/BaseDark.xaml
+++ b/src/Avalonia.Themes.Fluent/Accents/BaseDark.xaml
@@ -138,6 +138,7 @@
     <SolidColorBrush x:Key="SystemControlTransparentBrush" Color="Transparent" />
     <SolidColorBrush x:Key="SystemControlErrorTextForegroundBrush" Color="{StaticResource SystemErrorTextColor}" />
     <SolidColorBrush x:Key="SystemControlTransientBorderBrush" Color="#000000" Opacity="0.36" />
+    <!-- TODO implement AcrylicBrush -->
     <!--<AcrylicBrush x:Key="SystemControlTransientBackgroundBrush" BackgroundSource="HostBackdrop" TintColor="{StaticResource SystemChromeAltHighColor}" TintOpacity="0.8" FallbackColor="{StaticResource SystemChromeMediumLowColor}" />-->
     <SolidColorBrush x:Key="SystemControlTransientBackgroundBrush" Color="{StaticResource SystemChromeMediumLowColor}" />
     <StaticResource x:Key="SystemControlDescriptionTextForegroundBrush" ResourceKey="SystemControlPageTextBaseMediumBrush" />
diff --git a/src/Avalonia.Themes.Fluent/Accents/BaseLight.xaml b/src/Avalonia.Themes.Fluent/Accents/BaseLight.xaml
index b32c816851..07add26b99 100644
--- a/src/Avalonia.Themes.Fluent/Accents/BaseLight.xaml
+++ b/src/Avalonia.Themes.Fluent/Accents/BaseLight.xaml
@@ -138,6 +138,7 @@
     <SolidColorBrush x:Key="SystemControlTransparentBrush" Color="Transparent" />
     <SolidColorBrush x:Key="SystemControlErrorTextForegroundBrush" Color="{StaticResource SystemErrorTextColor}" />
     <SolidColorBrush x:Key="SystemControlTransientBorderBrush" Color="#000000" Opacity="0.14" />
+    <!-- TODO implement AcrylicBrush -->
     <!--<AcrylicBrush x:Key="SystemControlTransientBackgroundBrush" BackgroundSource="HostBackdrop" TintColor="{StaticResource SystemChromeAltHighColor}" TintOpacity="0.8" FallbackColor="{StaticResource SystemChromeMediumLowColor}" />-->
     <SolidColorBrush x:Key="SystemControlTransientBackgroundBrush" Color="{StaticResource SystemChromeMediumLowColor}" />
     <StaticResource x:Key="SystemControlDescriptionTextForegroundBrush" ResourceKey="SystemControlPageTextBaseMediumBrush" />
diff --git a/src/Avalonia.Themes.Fluent/Accents/FluentBaseDark.xaml b/src/Avalonia.Themes.Fluent/Accents/FluentBaseDark.xaml
index 57216c008a..7a715bbde7 100644
--- a/src/Avalonia.Themes.Fluent/Accents/FluentBaseDark.xaml
+++ b/src/Avalonia.Themes.Fluent/Accents/FluentBaseDark.xaml
@@ -85,7 +85,66 @@
     <StaticResource x:Key="ButtonBorderBrushPointerOver" ResourceKey="SystemControlHighlightBaseMediumLowBrush" />
     <StaticResource x:Key="ButtonBorderBrushPressed" ResourceKey="SystemControlHighlightTransparentBrush" />
     <StaticResource x:Key="ButtonBorderBrushDisabled" ResourceKey="SystemControlDisabledTransparentBrush" />
-    
+
+    <!-- BaseResources for ComboBox.xaml -->
+    <StaticResource x:Key="ComboBoxItemForeground" ResourceKey="SystemControlForegroundBaseHighBrush" />
+    <StaticResource x:Key="ComboBoxItemForegroundPressed" ResourceKey="SystemControlHighlightAltBaseHighBrush" />
+    <StaticResource x:Key="ComboBoxItemForegroundPointerOver" ResourceKey="SystemControlHighlightAltBaseHighBrush" />
+    <StaticResource x:Key="ComboBoxItemForegroundDisabled" ResourceKey="SystemControlDisabledBaseMediumLowBrush" />
+    <StaticResource x:Key="ComboBoxItemForegroundSelected" ResourceKey="SystemControlHighlightAltBaseHighBrush" />
+    <StaticResource x:Key="ComboBoxItemForegroundSelectedUnfocused" ResourceKey="SystemControlHighlightAltBaseHighBrush" />
+    <StaticResource x:Key="ComboBoxItemForegroundSelectedPressed" ResourceKey="SystemControlHighlightAltBaseHighBrush" />
+    <StaticResource x:Key="ComboBoxItemForegroundSelectedPointerOver" ResourceKey="SystemControlHighlightAltBaseHighBrush" />
+    <StaticResource x:Key="ComboBoxItemForegroundSelectedDisabled" ResourceKey="SystemControlDisabledBaseMediumLowBrush" />
+    <StaticResource x:Key="ComboBoxItemBackground" ResourceKey="SystemControlTransparentBrush" />
+    <StaticResource x:Key="ComboBoxItemBackgroundPressed" ResourceKey="SystemControlHighlightListMediumBrush" />
+    <StaticResource x:Key="ComboBoxItemBackgroundPointerOver" ResourceKey="SystemControlHighlightListLowBrush" />
+    <StaticResource x:Key="ComboBoxItemBackgroundDisabled" ResourceKey="SystemControlTransparentBrush" />
+    <StaticResource x:Key="ComboBoxItemBackgroundSelected" ResourceKey="SystemControlHighlightListAccentLowBrush" />
+    <StaticResource x:Key="ComboBoxItemBackgroundSelectedUnfocused" ResourceKey="SystemControlHighlightListAccentLowBrush" />
+    <StaticResource x:Key="ComboBoxItemBackgroundSelectedPressed" ResourceKey="SystemControlHighlightListAccentHighBrush" />
+    <StaticResource x:Key="ComboBoxItemBackgroundSelectedPointerOver" ResourceKey="SystemControlHighlightListAccentMediumBrush" />
+    <StaticResource x:Key="ComboBoxItemBackgroundSelectedDisabled" ResourceKey="SystemControlTransparentBrush" />
+    <StaticResource x:Key="ComboBoxItemBorderBrush" ResourceKey="SystemControlTransparentBrush" />
+    <StaticResource x:Key="ComboBoxItemBorderBrushPressed" ResourceKey="SystemControlTransparentBrush" />
+    <StaticResource x:Key="ComboBoxItemBorderBrushPointerOver" ResourceKey="SystemControlTransparentBrush" />
+    <StaticResource x:Key="ComboBoxItemBorderBrushDisabled" ResourceKey="SystemControlTransparentBrush" />
+    <StaticResource x:Key="ComboBoxItemBorderBrushSelected" ResourceKey="SystemControlTransparentBrush" />
+    <StaticResource x:Key="ComboBoxItemBorderBrushSelectedUnfocused" ResourceKey="SystemControlTransparentBrush" />
+    <StaticResource x:Key="ComboBoxItemBorderBrushSelectedPressed" ResourceKey="SystemControlTransparentBrush" />
+    <StaticResource x:Key="ComboBoxItemBorderBrushSelectedPointerOver" ResourceKey="SystemControlTransparentBrush" />
+    <StaticResource x:Key="ComboBoxItemBorderBrushSelectedDisabled" ResourceKey="SystemControlTransparentBrush" />
+
+    <StaticResource x:Key="ComboBoxBackground" ResourceKey="SystemControlBackgroundAltMediumLowBrush" />
+    <StaticResource x:Key="ComboBoxBackgroundPointerOver" ResourceKey="SystemControlPageBackgroundAltMediumBrush" />
+    <StaticResource x:Key="ComboBoxBackgroundPressed" ResourceKey="SystemControlBackgroundListMediumBrush" />
+    <StaticResource x:Key="ComboBoxBackgroundDisabled" ResourceKey="SystemControlBackgroundBaseLowBrush" />
+    <StaticResource x:Key="ComboBoxBackgroundUnfocused" ResourceKey="SystemControlHighlightListAccentLowBrush" />
+    <StaticResource x:Key="ComboBoxBackgroundBorderBrushFocused" ResourceKey="SystemControlHighlightTransparentBrush" />
+    <StaticResource x:Key="ComboBoxBackgroundBorderBrushUnfocused" ResourceKey="SystemControlHighlightBaseMediumLowBrush" />
+    <StaticResource x:Key="ComboBoxForeground" ResourceKey="SystemControlForegroundBaseHighBrush" />
+    <StaticResource x:Key="ComboBoxForegroundDisabled" ResourceKey="SystemControlDisabledBaseMediumLowBrush" />
+    <StaticResource x:Key="ComboBoxForegroundFocused" ResourceKey="SystemControlHighlightAltBaseHighBrush" />
+    <StaticResource x:Key="ComboBoxForegroundFocusedPressed" ResourceKey="SystemControlHighlightAltBaseHighBrush" />
+    <StaticResource x:Key="ComboBoxPlaceHolderForeground" ResourceKey="SystemControlPageTextBaseHighBrush" />
+    <StaticResource x:Key="ComboBoxPlaceHolderForegroundFocusedPressed" ResourceKey="SystemControlHighlightAltBaseHighBrush" />
+    <StaticResource x:Key="ComboBoxBorderBrush" ResourceKey="SystemControlForegroundBaseMediumLowBrush" />
+    <StaticResource x:Key="ComboBoxBorderBrushPointerOver" ResourceKey="SystemControlHighlightBaseMediumBrush" />
+    <StaticResource x:Key="ComboBoxBorderBrushPressed" ResourceKey="SystemControlHighlightBaseMediumLowBrush" />
+    <StaticResource x:Key="ComboBoxBorderBrushDisabled" ResourceKey="SystemControlDisabledBaseLowBrush" />
+    <StaticResource x:Key="ComboBoxDropDownBackgroundPointerOver" ResourceKey="SystemControlBackgroundListLowBrush" />
+    <StaticResource x:Key="ComboBoxDropDownBackgroundPointerPressed" ResourceKey="SystemControlBackgroundListMediumBrush" />
+    <StaticResource x:Key="ComboBoxFocusedDropDownBackgroundPointerOver" ResourceKey="SystemControlBackgroundChromeBlackLowBrush" />
+    <StaticResource x:Key="ComboBoxFocusedDropDownBackgroundPointerPressed" ResourceKey="SystemControlBackgroundChromeBlackMediumLowBrush" />
+    <StaticResource x:Key="ComboBoxDropDownGlyphForeground" ResourceKey="SystemControlForegroundBaseMediumHighBrush" />
+    <StaticResource x:Key="ComboBoxEditableDropDownGlyphForeground" ResourceKey="SystemControlForegroundAltMediumHighBrush" />
+    <StaticResource x:Key="ComboBoxDropDownGlyphForegroundDisabled" ResourceKey="SystemControlDisabledBaseMediumLowBrush" />
+    <StaticResource x:Key="ComboBoxDropDownGlyphForegroundFocused" ResourceKey="SystemControlHighlightAltBaseMediumHighBrush" />
+    <StaticResource x:Key="ComboBoxDropDownGlyphForegroundFocusedPressed" ResourceKey="SystemControlHighlightAltBaseMediumHighBrush" />
+    <StaticResource x:Key="ComboBoxDropDownBackground" ResourceKey="SystemControlTransientBackgroundBrush" />
+    <StaticResource x:Key="ComboBoxDropDownForeground" ResourceKey="SystemControlForegroundBaseHighBrush" />
+    <StaticResource x:Key="ComboBoxDropDownBorderBrush" ResourceKey="SystemControlTransientBorderBrush" />
+
     <!-- BaseResources for ListBox.xaml -->
     <Thickness x:Key="ListBoxBorderThemeThickness">0</Thickness>
     <SolidColorBrush x:Key="ListBoxBackgroundThemeBrush" Color="#CCFFFFFF" />
@@ -103,7 +162,7 @@
     <SolidColorBrush x:Key="ListBoxItemSelectedDisabledForegroundThemeBrush" Color="#99000000" />
     <SolidColorBrush x:Key="ListBoxItemSelectedForegroundThemeBrush" Color="White" />
     <SolidColorBrush x:Key="ListBoxItemSelectedPointerOverBackgroundThemeBrush" Color="#FF5F37BE" />
-    
+
     <!-- BaseResources for TextBox.xaml -->
     <StaticResource x:Key="TextControlForeground" ResourceKey="SystemControlForegroundBaseHighBrush" />
     <StaticResource x:Key="TextControlForegroundPointerOver" ResourceKey="SystemControlForegroundBaseHighBrush" />
diff --git a/src/Avalonia.Themes.Fluent/Accents/FluentBaseLight.xaml b/src/Avalonia.Themes.Fluent/Accents/FluentBaseLight.xaml
index bf874ce3f1..5c6286a0bc 100644
--- a/src/Avalonia.Themes.Fluent/Accents/FluentBaseLight.xaml
+++ b/src/Avalonia.Themes.Fluent/Accents/FluentBaseLight.xaml
@@ -86,6 +86,66 @@
     <StaticResource x:Key="ButtonBorderBrushPointerOver" ResourceKey="SystemControlHighlightBaseMediumLowBrush" />
     <StaticResource x:Key="ButtonBorderBrushPressed" ResourceKey="SystemControlHighlightTransparentBrush" />
     <StaticResource x:Key="ButtonBorderBrushDisabled" ResourceKey="SystemControlDisabledTransparentBrush" />
+
+    <!-- BaseResources for ComboBox.xaml -->
+    <StaticResource x:Key="ComboBoxItemForeground" ResourceKey="SystemControlForegroundBaseHighBrush" />
+    <StaticResource x:Key="ComboBoxItemForegroundPressed" ResourceKey="SystemControlHighlightAltBaseHighBrush" />
+    <StaticResource x:Key="ComboBoxItemForegroundPointerOver" ResourceKey="SystemControlHighlightAltBaseHighBrush" />
+    <StaticResource x:Key="ComboBoxItemForegroundDisabled" ResourceKey="SystemControlDisabledBaseMediumLowBrush" />
+    <StaticResource x:Key="ComboBoxItemForegroundSelected" ResourceKey="SystemControlHighlightAltBaseHighBrush" />
+    <StaticResource x:Key="ComboBoxItemForegroundSelectedUnfocused" ResourceKey="SystemControlHighlightAltBaseHighBrush" />
+    <StaticResource x:Key="ComboBoxItemForegroundSelectedPressed" ResourceKey="SystemControlHighlightAltBaseHighBrush" />
+    <StaticResource x:Key="ComboBoxItemForegroundSelectedPointerOver" ResourceKey="SystemControlHighlightAltBaseHighBrush" />
+    <StaticResource x:Key="ComboBoxItemForegroundSelectedDisabled" ResourceKey="SystemControlDisabledBaseMediumLowBrush" />
+    <StaticResource x:Key="ComboBoxItemBackground" ResourceKey="SystemControlTransparentBrush" />
+    <StaticResource x:Key="ComboBoxItemBackgroundPressed" ResourceKey="SystemControlHighlightListMediumBrush" />
+    <StaticResource x:Key="ComboBoxItemBackgroundPointerOver" ResourceKey="SystemControlHighlightListLowBrush" />
+    <StaticResource x:Key="ComboBoxItemBackgroundDisabled" ResourceKey="SystemControlTransparentBrush" />
+    <StaticResource x:Key="ComboBoxItemBackgroundSelected" ResourceKey="SystemControlHighlightListAccentLowBrush" />
+    <StaticResource x:Key="ComboBoxItemBackgroundSelectedUnfocused" ResourceKey="SystemControlHighlightListAccentLowBrush" />
+    <StaticResource x:Key="ComboBoxItemBackgroundSelectedPressed" ResourceKey="SystemControlHighlightListAccentHighBrush" />
+    <StaticResource x:Key="ComboBoxItemBackgroundSelectedPointerOver" ResourceKey="SystemControlHighlightListAccentMediumBrush" />
+    <StaticResource x:Key="ComboBoxItemBackgroundSelectedDisabled" ResourceKey="SystemControlTransparentBrush" />
+    <StaticResource x:Key="ComboBoxItemBorderBrush" ResourceKey="SystemControlTransparentBrush" />
+    <StaticResource x:Key="ComboBoxItemBorderBrushPressed" ResourceKey="SystemControlTransparentBrush" />
+    <StaticResource x:Key="ComboBoxItemBorderBrushPointerOver" ResourceKey="SystemControlTransparentBrush" />
+    <StaticResource x:Key="ComboBoxItemBorderBrushDisabled" ResourceKey="SystemControlTransparentBrush" />
+    <StaticResource x:Key="ComboBoxItemBorderBrushSelected" ResourceKey="SystemControlTransparentBrush" />
+    <StaticResource x:Key="ComboBoxItemBorderBrushSelectedUnfocused" ResourceKey="SystemControlTransparentBrush" />
+    <StaticResource x:Key="ComboBoxItemBorderBrushSelectedPressed" ResourceKey="SystemControlTransparentBrush" />
+    <StaticResource x:Key="ComboBoxItemBorderBrushSelectedPointerOver" ResourceKey="SystemControlTransparentBrush" />
+    <StaticResource x:Key="ComboBoxItemBorderBrushSelectedDisabled" ResourceKey="SystemControlTransparentBrush" />    
+
+    <StaticResource x:Key="ComboBoxBackground" ResourceKey="SystemControlBackgroundAltMediumLowBrush" />
+    <StaticResource x:Key="ComboBoxBackgroundPointerOver" ResourceKey="SystemControlPageBackgroundAltMediumBrush" />
+    <StaticResource x:Key="ComboBoxBackgroundPressed" ResourceKey="SystemControlBackgroundListMediumBrush" />
+    <StaticResource x:Key="ComboBoxBackgroundDisabled" ResourceKey="SystemControlBackgroundBaseLowBrush" />
+    <StaticResource x:Key="ComboBoxBackgroundUnfocused" ResourceKey="SystemControlHighlightListAccentLowBrush" />
+    <StaticResource x:Key="ComboBoxBackgroundBorderBrushFocused" ResourceKey="SystemControlHighlightTransparentBrush" />
+    <StaticResource x:Key="ComboBoxBackgroundBorderBrushUnfocused" ResourceKey="SystemControlHighlightBaseMediumLowBrush" />
+    <StaticResource x:Key="ComboBoxForeground" ResourceKey="SystemControlForegroundBaseHighBrush" />
+    <StaticResource x:Key="ComboBoxForegroundDisabled" ResourceKey="SystemControlDisabledBaseMediumLowBrush" />
+    <StaticResource x:Key="ComboBoxForegroundFocused" ResourceKey="SystemControlHighlightAltBaseHighBrush" />
+    <StaticResource x:Key="ComboBoxForegroundFocusedPressed" ResourceKey="SystemControlHighlightAltBaseHighBrush" />
+    <StaticResource x:Key="ComboBoxPlaceHolderForeground" ResourceKey="SystemControlPageTextBaseHighBrush" />
+    <StaticResource x:Key="ComboBoxPlaceHolderForegroundFocusedPressed" ResourceKey="SystemControlHighlightAltBaseHighBrush" />
+    <StaticResource x:Key="ComboBoxBorderBrush" ResourceKey="SystemControlForegroundBaseMediumLowBrush" />
+    <StaticResource x:Key="ComboBoxBorderBrushPointerOver" ResourceKey="SystemControlHighlightBaseMediumBrush" />
+    <StaticResource x:Key="ComboBoxBorderBrushPressed" ResourceKey="SystemControlHighlightBaseMediumLowBrush" />
+    <StaticResource x:Key="ComboBoxBorderBrushDisabled" ResourceKey="SystemControlDisabledBaseLowBrush" />
+    <StaticResource x:Key="ComboBoxDropDownBackgroundPointerOver" ResourceKey="SystemControlBackgroundListLowBrush" />
+    <StaticResource x:Key="ComboBoxDropDownBackgroundPointerPressed" ResourceKey="SystemControlBackgroundListMediumBrush" />
+    <StaticResource x:Key="ComboBoxFocusedDropDownBackgroundPointerOver" ResourceKey="SystemControlBackgroundChromeBlackLowBrush" />
+    <StaticResource x:Key="ComboBoxFocusedDropDownBackgroundPointerPressed" ResourceKey="SystemControlBackgroundChromeBlackMediumLowBrush" />
+    <StaticResource x:Key="ComboBoxDropDownGlyphForeground" ResourceKey="SystemControlForegroundBaseMediumHighBrush" />
+    <StaticResource x:Key="ComboBoxEditableDropDownGlyphForeground" ResourceKey="SystemControlForegroundBaseMediumHighBrush" />
+    <StaticResource x:Key="ComboBoxDropDownGlyphForegroundDisabled" ResourceKey="SystemControlDisabledBaseMediumLowBrush" />
+    <StaticResource x:Key="ComboBoxDropDownGlyphForegroundFocused" ResourceKey="SystemControlHighlightAltBaseMediumHighBrush" />
+    <StaticResource x:Key="ComboBoxDropDownGlyphForegroundFocusedPressed" ResourceKey="SystemControlHighlightAltBaseMediumHighBrush" />
+    <StaticResource x:Key="ComboBoxDropDownBackground" ResourceKey="SystemControlTransientBackgroundBrush" />
+    <StaticResource x:Key="ComboBoxDropDownForeground" ResourceKey="SystemControlForegroundBaseHighBrush" />
+    <StaticResource x:Key="ComboBoxDropDownBorderBrush" ResourceKey="SystemControlTransientBorderBrush" />
+    
     <!-- BaseResources for Listbox.xaml -->
     <Thickness x:Key="ListBoxBorderThemeThickness">0</Thickness>
     <SolidColorBrush x:Key="ListBoxBackgroundThemeBrush" Color="#CCFFFFFF" />
diff --git a/src/Avalonia.Themes.Fluent/Accents/FluentControlResourcesDark.xaml b/src/Avalonia.Themes.Fluent/Accents/FluentControlResourcesDark.xaml
index ab83f4f474..7364c339f1 100644
--- a/src/Avalonia.Themes.Fluent/Accents/FluentControlResourcesDark.xaml
+++ b/src/Avalonia.Themes.Fluent/Accents/FluentControlResourcesDark.xaml
@@ -39,6 +39,118 @@
     <SolidColorBrush x:Key="ButtonPressedBackgroundThemeBrush" Color="#FFFFFFFF" />
     <SolidColorBrush x:Key="ButtonPressedForegroundThemeBrush" Color="#FF000000" />
 
+    <!-- Resources for ComboBox.xaml -->
+    <x:Double x:Key="ComboBoxArrowThemeFontSize">21</x:Double>
+    <x:Double x:Key="ComboBoxThemeMinWidth">64</x:Double>
+    <x:Double x:Key="ComboBoxPopupThemeMinWidth">80</x:Double>
+    <x:Double x:Key="ComboBoxPopupThemeTouchMinWidth">240</x:Double>
+    <Thickness x:Key="ComboBoxBorderThemeThickness">1</Thickness>
+    <Thickness x:Key="ComboBoxDropdownBorderThickness">1</Thickness>
+    <Thickness x:Key="ComboBoxHeaderThemeMargin">0,0,0,4</Thickness>
+    <Thickness x:Key="ComboBoxPopupBorderThemeThickness">2</Thickness>
+    <Thickness x:Key="ComboBoxItemThemePadding">11,5,11,7</Thickness>
+    <Thickness x:Key="ComboBoxItemThemeTouchPadding">11,11,11,13</Thickness>
+    <Thickness x:Key="ComboBoxItemThemeGameControllerPadding">11,11,11,13</Thickness>
+    <FontWeight x:Key="ComboBoxHeaderThemeFontWeight">Normal</FontWeight>
+    <FontWeight x:Key="ComboBoxPlaceholderTextThemeFontWeight">SemiLight</FontWeight>
+    <StaticResource x:Key="ComboBoxItemForeground" ResourceKey="SystemControlForegroundBaseHighBrush" />
+    <StaticResource x:Key="ComboBoxItemForegroundPressed" ResourceKey="SystemControlHighlightAltBaseHighBrush" />
+    <StaticResource x:Key="ComboBoxItemForegroundPointerOver" ResourceKey="SystemControlHighlightAltBaseHighBrush" />
+    <StaticResource x:Key="ComboBoxItemForegroundDisabled" ResourceKey="SystemControlDisabledBaseMediumLowBrush" />
+    <StaticResource x:Key="ComboBoxItemForegroundSelected" ResourceKey="SystemControlHighlightAltBaseHighBrush" />
+    <StaticResource x:Key="ComboBoxItemForegroundSelectedUnfocused" ResourceKey="SystemControlHighlightAltBaseHighBrush" />
+    <StaticResource x:Key="ComboBoxItemForegroundSelectedPressed" ResourceKey="SystemControlHighlightAltBaseHighBrush" />
+    <StaticResource x:Key="ComboBoxItemForegroundSelectedPointerOver" ResourceKey="SystemControlHighlightAltBaseHighBrush" />
+    <StaticResource x:Key="ComboBoxItemForegroundSelectedDisabled" ResourceKey="SystemControlDisabledBaseMediumLowBrush" />
+    <StaticResource x:Key="ComboBoxItemBackground" ResourceKey="SystemControlTransparentBrush" />
+    <StaticResource x:Key="ComboBoxItemBackgroundPressed" ResourceKey="SystemControlHighlightListMediumBrush" />
+    <StaticResource x:Key="ComboBoxItemBackgroundPointerOver" ResourceKey="SystemControlHighlightListLowBrush" />
+    <StaticResource x:Key="ComboBoxItemBackgroundDisabled" ResourceKey="SystemControlTransparentBrush" />
+    <StaticResource x:Key="ComboBoxItemBackgroundSelected" ResourceKey="SystemControlHighlightListAccentLowBrush" />
+    <StaticResource x:Key="ComboBoxItemBackgroundSelectedUnfocused" ResourceKey="SystemControlHighlightListAccentLowBrush" />
+    <StaticResource x:Key="ComboBoxItemBackgroundSelectedPressed" ResourceKey="SystemControlHighlightListAccentHighBrush" />
+    <StaticResource x:Key="ComboBoxItemBackgroundSelectedPointerOver" ResourceKey="SystemControlHighlightListAccentMediumBrush" />
+    <StaticResource x:Key="ComboBoxItemBackgroundSelectedDisabled" ResourceKey="SystemControlTransparentBrush" />
+    <StaticResource x:Key="ComboBoxItemBorderBrush" ResourceKey="SystemControlTransparentBrush" />
+    <StaticResource x:Key="ComboBoxItemBorderBrushPressed" ResourceKey="SystemControlTransparentBrush" />
+    <StaticResource x:Key="ComboBoxItemBorderBrushPointerOver" ResourceKey="SystemControlTransparentBrush" />
+    <StaticResource x:Key="ComboBoxItemBorderBrushDisabled" ResourceKey="SystemControlTransparentBrush" />
+    <StaticResource x:Key="ComboBoxItemBorderBrushSelected" ResourceKey="SystemControlTransparentBrush" />
+    <StaticResource x:Key="ComboBoxItemBorderBrushSelectedUnfocused" ResourceKey="SystemControlTransparentBrush" />
+    <StaticResource x:Key="ComboBoxItemBorderBrushSelectedPressed" ResourceKey="SystemControlTransparentBrush" />
+    <StaticResource x:Key="ComboBoxItemBorderBrushSelectedPointerOver" ResourceKey="SystemControlTransparentBrush" />
+    <StaticResource x:Key="ComboBoxItemBorderBrushSelectedDisabled" ResourceKey="SystemControlTransparentBrush" />
+
+    <StaticResource x:Key="ComboBoxBackground" ResourceKey="SystemControlBackgroundAltMediumLowBrush" />
+    <StaticResource x:Key="ComboBoxBackgroundPointerOver" ResourceKey="SystemControlPageBackgroundAltMediumBrush" />
+    <StaticResource x:Key="ComboBoxBackgroundPressed" ResourceKey="SystemControlBackgroundListMediumBrush" />
+    <StaticResource x:Key="ComboBoxBackgroundDisabled" ResourceKey="SystemControlBackgroundBaseLowBrush" />
+    <StaticResource x:Key="ComboBoxBackgroundUnfocused" ResourceKey="SystemControlHighlightListAccentLowBrush" />
+    <StaticResource x:Key="ComboBoxBackgroundBorderBrushFocused" ResourceKey="SystemControlHighlightTransparentBrush" />
+    <StaticResource x:Key="ComboBoxBackgroundBorderBrushUnfocused" ResourceKey="SystemControlHighlightBaseMediumLowBrush" />
+    <StaticResource x:Key="ComboBoxForeground" ResourceKey="SystemControlForegroundBaseHighBrush" />
+    <StaticResource x:Key="ComboBoxForegroundDisabled" ResourceKey="SystemControlDisabledBaseMediumLowBrush" />
+    <StaticResource x:Key="ComboBoxForegroundFocused" ResourceKey="SystemControlHighlightAltBaseHighBrush" />
+    <StaticResource x:Key="ComboBoxForegroundFocusedPressed" ResourceKey="SystemControlHighlightAltBaseHighBrush" />
+    <StaticResource x:Key="ComboBoxPlaceHolderForeground" ResourceKey="SystemControlPageTextBaseHighBrush" />
+    <StaticResource x:Key="ComboBoxPlaceHolderForegroundFocusedPressed" ResourceKey="SystemControlHighlightAltBaseHighBrush" />
+    <StaticResource x:Key="ComboBoxBorderBrush" ResourceKey="SystemControlForegroundBaseMediumBrush" />
+    <StaticResource x:Key="ComboBoxBorderBrushPointerOver" ResourceKey="SystemControlHighlightBaseMediumHighBrush" />
+    <StaticResource x:Key="ComboBoxBorderBrushPressed" ResourceKey="SystemControlHighlightBaseMediumBrush" />
+    <StaticResource x:Key="ComboBoxBorderBrushDisabled" ResourceKey="SystemControlDisabledBaseLowBrush" />
+    <StaticResource x:Key="ComboBoxDropDownGlyphForeground" ResourceKey="SystemControlForegroundBaseMediumHighBrush" />
+    <StaticResource x:Key="ComboBoxDropDownGlyphForegroundDisabled" ResourceKey="SystemControlDisabledBaseMediumLowBrush" />
+    <StaticResource x:Key="ComboBoxDropDownGlyphForegroundFocused" ResourceKey="SystemControlHighlightAltBaseMediumHighBrush" />
+    <StaticResource x:Key="ComboBoxDropDownGlyphForegroundFocusedPressed" ResourceKey="SystemControlHighlightAltBaseMediumHighBrush" />    
+    <StaticResource x:Key="ComboBoxDropDownForeground" ResourceKey="SystemControlForegroundBaseHighBrush" />    
+    <StaticResource x:Key="ComboBoxDropDownBackground" ResourceKey="SystemControlTransientBackgroundBrush" />
+    <StaticResource x:Key="ComboBoxDropDownBorderBrush" ResourceKey="SystemControlTransientBorderBrush" />
+
+    <StaticResource x:Key="ComboBoxLightDismissOverlayBackground" ResourceKey="SystemControlPageBackgroundMediumAltMediumBrush" />
+    <SolidColorBrush x:Key="ComboBoxArrowDisabledForegroundThemeBrush" Color="#66FFFFFF" />
+    <SolidColorBrush x:Key="ComboBoxArrowForegroundThemeBrush" Color="#FF000000" />
+    <SolidColorBrush x:Key="ComboBoxArrowPressedForegroundThemeBrush" Color="#FF000000" />
+    <SolidColorBrush x:Key="ComboBoxBackgroundThemeBrush" Color="#CCFFFFFF" />
+    <SolidColorBrush x:Key="ComboBoxBorderThemeBrush" Color="#CCFFFFFF" />
+    <SolidColorBrush x:Key="ComboBoxDisabledBackgroundThemeBrush" Color="Transparent" />
+    <SolidColorBrush x:Key="ComboBoxDisabledBorderThemeBrush" Color="#66FFFFFF" />
+    <SolidColorBrush x:Key="ComboBoxDisabledForegroundThemeBrush" Color="#66FFFFFF" />
+    <SolidColorBrush x:Key="ComboBoxFocusedBackgroundThemeBrush" Color="White" />
+    <SolidColorBrush x:Key="ComboBoxFocusedBorderThemeBrush" Color="White" />
+    <SolidColorBrush x:Key="ComboBoxFocusedForegroundThemeBrush" Color="White" />
+    <SolidColorBrush x:Key="ComboBoxForegroundThemeBrush" Color="#FF000000" />
+    <SolidColorBrush x:Key="ComboBoxHeaderForegroundThemeBrush" Color="#FFFFFFFF" />
+    <SolidColorBrush x:Key="ComboBoxItemDisabledForegroundThemeBrush" Color="#66000000" />
+    <SolidColorBrush x:Key="ComboBoxItemPointerOverBackgroundThemeBrush" Color="#21000000" />
+    <SolidColorBrush x:Key="ComboBoxItemPointerOverForegroundThemeBrush" Color="#FF000000" />
+    <SolidColorBrush x:Key="ComboBoxItemPressedBackgroundThemeBrush" Color="#FFD3D3D3" />
+    <SolidColorBrush x:Key="ComboBoxItemPressedForegroundThemeBrush" Color="#FF000000" />
+    <SolidColorBrush x:Key="ComboBoxItemSelectedBackgroundThemeBrush" Color="#FF4617B4" />
+    <SolidColorBrush x:Key="ComboBoxItemSelectedDisabledBackgroundThemeBrush" Color="#8C000000" />
+    <SolidColorBrush x:Key="ComboBoxItemSelectedDisabledForegroundThemeBrush" Color="#99FFFFFF" />
+    <SolidColorBrush x:Key="ComboBoxItemSelectedForegroundThemeBrush" Color="White" />
+    <SolidColorBrush x:Key="ComboBoxItemSelectedPointerOverBackgroundThemeBrush" Color="#FF5F37BE" />
+    <SolidColorBrush x:Key="ComboBoxPlaceholderTextForegroundThemeBrush" Color="#88000000" />
+    <SolidColorBrush x:Key="ComboBoxPointerOverBackgroundThemeBrush" Color="#DEFFFFFF" />
+    <SolidColorBrush x:Key="ComboBoxPointerOverBorderThemeBrush" Color="#DEFFFFFF" />
+    <SolidColorBrush x:Key="ComboBoxPopupBackgroundThemeBrush" Color="#FFFFFFFF" />
+    <SolidColorBrush x:Key="ComboBoxPopupBorderThemeBrush" Color="#FF212121" />
+    <SolidColorBrush x:Key="ComboBoxPopupForegroundThemeBrush" Color="#FF000000" />
+    <SolidColorBrush x:Key="ComboBoxPressedBackgroundThemeBrush" Color="#FFFFFFFF" />
+    <SolidColorBrush x:Key="ComboBoxPressedBorderThemeBrush" Color="#FFFFFFFF" />
+    <SolidColorBrush x:Key="ComboBoxPressedHighlightThemeBrush" Color="#FFD3D3D3" />
+    <SolidColorBrush x:Key="ComboBoxPressedForegroundThemeBrush" Color="#FF000000" />
+    <SolidColorBrush x:Key="ComboBoxSelectedBackgroundThemeBrush" Color="#FF4617B4" />
+    <SolidColorBrush x:Key="ComboBoxSelectedPointerOverBackgroundThemeBrush" Color="#FF5F37BE" />
+
+    <Thickness x:Key="ComboBoxDropdownBorderPadding">0</Thickness>
+    <Thickness x:Key="ComboBoxDropdownContentMargin">0,4,0,4</Thickness>
+    <StaticResource x:Key="ComboBoxDropDownBackgroundPointerOver" ResourceKey="SystemControlBackgroundListLowBrush" />
+    <StaticResource x:Key="ComboBoxDropDownBackgroundPointerPressed" ResourceKey="SystemControlBackgroundListMediumBrush" />
+    <StaticResource x:Key="ComboBoxFocusedDropDownBackgroundPointerOver" ResourceKey="SystemControlBackgroundBaseLowBrush" />
+    <StaticResource x:Key="ComboBoxFocusedDropDownBackgroundPointerPressed" ResourceKey="SystemControlBackgroundBaseMediumLowBrush" />
+    <StaticResource x:Key="ComboBoxEditableDropDownGlyphForeground" ResourceKey="SystemControlForegroundBaseMediumHighBrush" />
+
     <!-- Resources for ListBox.xaml -->
     <Thickness x:Key="ListBoxBorderThemeThickness">0</Thickness>
     <SolidColorBrush x:Key="ListBoxBackgroundThemeBrush" Color="#CCFFFFFF" />
diff --git a/src/Avalonia.Themes.Fluent/Accents/FluentControlResourcesLight.xaml b/src/Avalonia.Themes.Fluent/Accents/FluentControlResourcesLight.xaml
index 7c132dd22f..15e157f573 100644
--- a/src/Avalonia.Themes.Fluent/Accents/FluentControlResourcesLight.xaml
+++ b/src/Avalonia.Themes.Fluent/Accents/FluentControlResourcesLight.xaml
@@ -39,6 +39,118 @@
     <SolidColorBrush x:Key="ButtonPressedBackgroundThemeBrush" Color="#FF000000" />
     <SolidColorBrush x:Key="ButtonPressedForegroundThemeBrush" Color="#FFFFFFFF" />
 
+    <!-- Resources for ComboBox.xaml -->
+    <x:Double x:Key="ComboBoxArrowThemeFontSize">21</x:Double>
+    <x:Double x:Key="ComboBoxThemeMinWidth">64</x:Double>
+    <x:Double x:Key="ComboBoxPopupThemeMinWidth">80</x:Double>
+    <x:Double x:Key="ComboBoxPopupThemeTouchMinWidth">240</x:Double>
+    <Thickness x:Key="ComboBoxBorderThemeThickness">1</Thickness>
+    <Thickness x:Key="ComboBoxDropdownBorderThickness">1</Thickness>
+    <Thickness x:Key="ComboBoxHeaderThemeMargin">0,0,0,4</Thickness>
+    <Thickness x:Key="ComboBoxPopupBorderThemeThickness">2</Thickness>
+    <Thickness x:Key="ComboBoxItemThemePadding">11,5,11,7</Thickness>
+    <Thickness x:Key="ComboBoxItemThemeTouchPadding">11,11,11,13</Thickness>
+    <Thickness x:Key="ComboBoxItemThemeGameControllerPadding">11,11,11,13</Thickness>
+    <FontWeight x:Key="ComboBoxHeaderThemeFontWeight">Normal</FontWeight>
+    <FontWeight x:Key="ComboBoxPlaceholderTextThemeFontWeight">SemiLight</FontWeight>
+    <StaticResource x:Key="ComboBoxItemForeground" ResourceKey="SystemControlForegroundBaseHighBrush" />
+    <StaticResource x:Key="ComboBoxItemForegroundPressed" ResourceKey="SystemControlHighlightAltBaseHighBrush" />
+    <StaticResource x:Key="ComboBoxItemForegroundPointerOver" ResourceKey="SystemControlHighlightAltBaseHighBrush" />
+    <StaticResource x:Key="ComboBoxItemForegroundDisabled" ResourceKey="SystemControlDisabledBaseMediumLowBrush" />
+    <StaticResource x:Key="ComboBoxItemForegroundSelected" ResourceKey="SystemControlHighlightAltBaseHighBrush" />
+    <StaticResource x:Key="ComboBoxItemForegroundSelectedUnfocused" ResourceKey="SystemControlHighlightAltBaseHighBrush" />
+    <StaticResource x:Key="ComboBoxItemForegroundSelectedPressed" ResourceKey="SystemControlHighlightAltBaseHighBrush" />
+    <StaticResource x:Key="ComboBoxItemForegroundSelectedPointerOver" ResourceKey="SystemControlHighlightAltBaseHighBrush" />
+    <StaticResource x:Key="ComboBoxItemForegroundSelectedDisabled" ResourceKey="SystemControlDisabledBaseMediumLowBrush" />
+    <StaticResource x:Key="ComboBoxItemBackground" ResourceKey="SystemControlTransparentBrush" />
+    <StaticResource x:Key="ComboBoxItemBackgroundPressed" ResourceKey="SystemControlHighlightListMediumBrush" />
+    <StaticResource x:Key="ComboBoxItemBackgroundPointerOver" ResourceKey="SystemControlHighlightListLowBrush" />
+    <StaticResource x:Key="ComboBoxItemBackgroundDisabled" ResourceKey="SystemControlTransparentBrush" />
+    <StaticResource x:Key="ComboBoxItemBackgroundSelected" ResourceKey="SystemControlHighlightListAccentLowBrush" />
+    <StaticResource x:Key="ComboBoxItemBackgroundSelectedUnfocused" ResourceKey="SystemControlHighlightListAccentLowBrush" />
+    <StaticResource x:Key="ComboBoxItemBackgroundSelectedPressed" ResourceKey="SystemControlHighlightListAccentHighBrush" />
+    <StaticResource x:Key="ComboBoxItemBackgroundSelectedPointerOver" ResourceKey="SystemControlHighlightListAccentMediumBrush" />
+    <StaticResource x:Key="ComboBoxItemBackgroundSelectedDisabled" ResourceKey="SystemControlTransparentBrush" />
+    <StaticResource x:Key="ComboBoxItemBorderBrush" ResourceKey="SystemControlTransparentBrush" />
+    <StaticResource x:Key="ComboBoxItemBorderBrushPressed" ResourceKey="SystemControlTransparentBrush" />
+    <StaticResource x:Key="ComboBoxItemBorderBrushPointerOver" ResourceKey="SystemControlTransparentBrush" />
+    <StaticResource x:Key="ComboBoxItemBorderBrushDisabled" ResourceKey="SystemControlTransparentBrush" />
+    <StaticResource x:Key="ComboBoxItemBorderBrushSelected" ResourceKey="SystemControlTransparentBrush" />
+    <StaticResource x:Key="ComboBoxItemBorderBrushSelectedUnfocused" ResourceKey="SystemControlTransparentBrush" />
+    <StaticResource x:Key="ComboBoxItemBorderBrushSelectedPressed" ResourceKey="SystemControlTransparentBrush" />
+    <StaticResource x:Key="ComboBoxItemBorderBrushSelectedPointerOver" ResourceKey="SystemControlTransparentBrush" />
+    <StaticResource x:Key="ComboBoxItemBorderBrushSelectedDisabled" ResourceKey="SystemControlTransparentBrush" />
+
+    <StaticResource x:Key="ComboBoxBackground" ResourceKey="SystemControlBackgroundAltMediumLowBrush" />
+    <StaticResource x:Key="ComboBoxBackgroundPointerOver" ResourceKey="SystemControlPageBackgroundAltMediumBrush" />
+    <StaticResource x:Key="ComboBoxBackgroundPressed" ResourceKey="SystemControlBackgroundListMediumBrush" />
+    <StaticResource x:Key="ComboBoxBackgroundDisabled" ResourceKey="SystemControlBackgroundBaseLowBrush" />
+    <StaticResource x:Key="ComboBoxBackgroundUnfocused" ResourceKey="SystemControlHighlightListAccentLowBrush" />
+    <StaticResource x:Key="ComboBoxBackgroundBorderBrushFocused" ResourceKey="SystemControlHighlightTransparentBrush" />
+    <StaticResource x:Key="ComboBoxBackgroundBorderBrushUnfocused" ResourceKey="SystemControlHighlightBaseMediumLowBrush" />
+    <StaticResource x:Key="ComboBoxForeground" ResourceKey="SystemControlForegroundBaseHighBrush" />
+    <StaticResource x:Key="ComboBoxForegroundDisabled" ResourceKey="SystemControlDisabledBaseMediumLowBrush" />
+    <StaticResource x:Key="ComboBoxForegroundFocused" ResourceKey="SystemControlHighlightAltBaseHighBrush" />
+    <StaticResource x:Key="ComboBoxForegroundFocusedPressed" ResourceKey="SystemControlHighlightAltBaseHighBrush" />
+    <StaticResource x:Key="ComboBoxPlaceHolderForeground" ResourceKey="SystemControlPageTextBaseHighBrush" />
+    <StaticResource x:Key="ComboBoxPlaceHolderForegroundFocusedPressed" ResourceKey="SystemControlHighlightAltBaseHighBrush" />
+    <StaticResource x:Key="ComboBoxBorderBrush" ResourceKey="SystemControlForegroundBaseMediumBrush" />
+    <StaticResource x:Key="ComboBoxBorderBrushPointerOver" ResourceKey="SystemControlHighlightBaseMediumHighBrush" />
+    <StaticResource x:Key="ComboBoxBorderBrushPressed" ResourceKey="SystemControlHighlightBaseMediumBrush" />
+    <StaticResource x:Key="ComboBoxBorderBrushDisabled" ResourceKey="SystemControlDisabledBaseLowBrush" />
+    <StaticResource x:Key="ComboBoxDropDownGlyphForeground" ResourceKey="SystemControlForegroundBaseMediumHighBrush" />
+    <StaticResource x:Key="ComboBoxDropDownGlyphForegroundDisabled" ResourceKey="SystemControlDisabledBaseMediumLowBrush" />
+    <StaticResource x:Key="ComboBoxDropDownGlyphForegroundFocused" ResourceKey="SystemControlHighlightAltBaseMediumHighBrush" />
+    <StaticResource x:Key="ComboBoxDropDownGlyphForegroundFocusedPressed" ResourceKey="SystemControlHighlightAltBaseMediumHighBrush" />    
+    <StaticResource x:Key="ComboBoxDropDownForeground" ResourceKey="SystemControlForegroundBaseHighBrush" />    
+    <StaticResource x:Key="ComboBoxDropDownBackground" ResourceKey="SystemControlTransientBackgroundBrush" />
+    <StaticResource x:Key="ComboBoxDropDownBorderBrush" ResourceKey="SystemControlTransientBorderBrush" />
+
+    <StaticResource x:Key="ComboBoxLightDismissOverlayBackground" ResourceKey="SystemControlPageBackgroundMediumAltMediumBrush" />
+    <SolidColorBrush x:Key="ComboBoxArrowDisabledForegroundThemeBrush" Color="#66000000" />
+    <SolidColorBrush x:Key="ComboBoxArrowForegroundThemeBrush" Color="#FF000000" />
+    <SolidColorBrush x:Key="ComboBoxArrowPressedForegroundThemeBrush" Color="#FF000000" />
+    <SolidColorBrush x:Key="ComboBoxBackgroundThemeBrush" Color="#CCFFFFFF" />
+    <SolidColorBrush x:Key="ComboBoxBorderThemeBrush" Color="#45000000" />
+    <SolidColorBrush x:Key="ComboBoxDisabledBackgroundThemeBrush" Color="#66CACACA" />
+    <SolidColorBrush x:Key="ComboBoxDisabledBorderThemeBrush" Color="#26000000" />
+    <SolidColorBrush x:Key="ComboBoxDisabledForegroundThemeBrush" Color="#66000000" />
+    <SolidColorBrush x:Key="ComboBoxFocusedBackgroundThemeBrush" Color="White" />
+    <SolidColorBrush x:Key="ComboBoxFocusedBorderThemeBrush" Color="#70000000" />
+    <SolidColorBrush x:Key="ComboBoxFocusedForegroundThemeBrush" Color="White" />
+    <SolidColorBrush x:Key="ComboBoxForegroundThemeBrush" Color="#FF000000" />
+    <SolidColorBrush x:Key="ComboBoxHeaderForegroundThemeBrush" Color="#FF000000" />
+    <SolidColorBrush x:Key="ComboBoxItemDisabledForegroundThemeBrush" Color="#66000000" />
+    <SolidColorBrush x:Key="ComboBoxItemPointerOverBackgroundThemeBrush" Color="#21000000" />
+    <SolidColorBrush x:Key="ComboBoxItemPointerOverForegroundThemeBrush" Color="#FF000000" />
+    <SolidColorBrush x:Key="ComboBoxItemPressedBackgroundThemeBrush" Color="#FFD3D3D3" />
+    <SolidColorBrush x:Key="ComboBoxItemPressedForegroundThemeBrush" Color="#FF000000" />
+    <SolidColorBrush x:Key="ComboBoxItemSelectedBackgroundThemeBrush" Color="#FF4617B4" />
+    <SolidColorBrush x:Key="ComboBoxItemSelectedForegroundThemeBrush" Color="White" />
+    <SolidColorBrush x:Key="ComboBoxItemSelectedDisabledBackgroundThemeBrush" Color="#8C000000" />
+    <SolidColorBrush x:Key="ComboBoxItemSelectedDisabledForegroundThemeBrush" Color="#99FFFFFF" />
+    <SolidColorBrush x:Key="ComboBoxItemSelectedPointerOverBackgroundThemeBrush" Color="#FF5F37BE" />
+    <SolidColorBrush x:Key="ComboBoxPlaceholderTextForegroundThemeBrush" Color="#88000000" />
+    <SolidColorBrush x:Key="ComboBoxPointerOverBackgroundThemeBrush" Color="#DEFFFFFF" />
+    <SolidColorBrush x:Key="ComboBoxPointerOverBorderThemeBrush" Color="#70000000" />
+    <SolidColorBrush x:Key="ComboBoxPopupBackgroundThemeBrush" Color="#FFFFFFFF" />
+    <SolidColorBrush x:Key="ComboBoxPopupBorderThemeBrush" Color="#FF212121" />
+    <SolidColorBrush x:Key="ComboBoxPopupForegroundThemeBrush" Color="#FF000000" />
+    <SolidColorBrush x:Key="ComboBoxPressedBackgroundThemeBrush" Color="#FFFFFFFF" />
+    <SolidColorBrush x:Key="ComboBoxPressedBorderThemeBrush" Color="#A3000000" />
+    <SolidColorBrush x:Key="ComboBoxPressedHighlightThemeBrush" Color="#FFD3D3D3" />
+    <SolidColorBrush x:Key="ComboBoxPressedForegroundThemeBrush" Color="#FF000000" />
+    <SolidColorBrush x:Key="ComboBoxSelectedBackgroundThemeBrush" Color="#FF4617B4" />
+    <SolidColorBrush x:Key="ComboBoxSelectedPointerOverBackgroundThemeBrush" Color="#FF5F37BE" />
+
+    <Thickness x:Key="ComboBoxDropdownBorderPadding">0</Thickness>
+    <Thickness x:Key="ComboBoxDropdownContentMargin">0,4,0,4</Thickness>
+    <StaticResource x:Key="ComboBoxDropDownBackgroundPointerOver" ResourceKey="SystemControlBackgroundListLowBrush" />
+    <StaticResource x:Key="ComboBoxDropDownBackgroundPointerPressed" ResourceKey="SystemControlBackgroundListMediumBrush" />
+    <StaticResource x:Key="ComboBoxFocusedDropDownBackgroundPointerOver" ResourceKey="SystemControlBackgroundBaseLowBrush" />
+    <StaticResource x:Key="ComboBoxFocusedDropDownBackgroundPointerPressed" ResourceKey="SystemControlBackgroundBaseMediumLowBrush" />
+    <StaticResource x:Key="ComboBoxEditableDropDownGlyphForeground" ResourceKey="SystemControlForegroundBaseMediumHighBrush" />
+    
     <!-- Resources for ListBox.xaml -->
     <Thickness x:Key="ListBoxBorderThemeThickness">0</Thickness>
     <SolidColorBrush x:Key="ListBoxBackgroundThemeBrush" Color="#CCFFFFFF" />
diff --git a/src/Avalonia.Themes.Fluent/ComboBox.xaml b/src/Avalonia.Themes.Fluent/ComboBox.xaml
index 95bd9550a5..70d92fe141 100644
--- a/src/Avalonia.Themes.Fluent/ComboBox.xaml
+++ b/src/Avalonia.Themes.Fluent/ComboBox.xaml
@@ -1,13 +1,38 @@
-<Styles xmlns="https://github.com/avaloniaui">
+<Styles xmlns="https://github.com/avaloniaui" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
+  <Styles.Resources>
+    <Thickness x:Key="ComboBoxTopHeaderMargin">0,0,0,4</Thickness>
+    <x:Int32 x:Key="ComboBoxPopupMaxNumberOfItems">15</x:Int32>
+    <x:Int32 x:Key="ComboBoxPopupMaxNumberOfItemsThatCanBeShownOnOneSide">7</x:Int32>
+
+    <Thickness x:Key="ComboBoxPadding">12,5,0,7</Thickness>
+    <Thickness x:Key="ComboBoxEditableTextPadding">11,5,32,6</Thickness>
+    <Thickness x:Key="ComboBoxMinHeight">32</Thickness>
+  </Styles.Resources>
+  <Design.PreviewWith>
+    <Border Padding="20">
+      <ComboBox SelectedIndex="0">
+        <ComboBoxItem>Item 1</ComboBoxItem>
+        <ComboBoxItem>Item 2</ComboBoxItem>
+      </ComboBox>
+    </Border>
+  </Design.PreviewWith>
   <Style Selector="ComboBox">
-    <Setter Property="Background" Value="Transparent"/>
-    <Setter Property="BorderBrush" Value="{DynamicResource ThemeBorderMidBrush}"/>
-    <Setter Property="BorderThickness" Value="{DynamicResource ThemeBorderThickness}"/>
-    <Setter Property="Padding" Value="4"/>
-    <Setter Property="MinHeight" Value="20"/>
+    <Setter Property="Padding" Value="{DynamicResource ComboBoxPadding}" />
+    <Setter Property="MaxDropDownHeight" Value="504" />
+    <Setter Property="Foreground" Value="{DynamicResource ComboBoxForeground}" />
+    <Setter Property="Background" Value="{DynamicResource ComboBoxBackground}" />
+    <Setter Property="BorderBrush" Value="{DynamicResource ComboBoxBorderBrush}" />
+    <Setter Property="BorderThickness" Value="{DynamicResource ComboBoxBorderThemeThickness}" />        
+    <Setter Property="ScrollViewer.HorizontalScrollBarVisibility" Value="Disabled" />
+    <Setter Property="ScrollViewer.VerticalScrollBarVisibility" Value="Auto" />        
+    <Setter Property="HorizontalAlignment" Value="Left" />
+    <Setter Property="VerticalAlignment" Value="Top" />
+    <Setter Property="FontFamily" Value="{DynamicResource ContentControlThemeFontFamily}" />
+    <Setter Property="FontSize" Value="{DynamicResource ControlContentThemeFontSize}" />           
     <Setter Property="Template">
       <ControlTemplate>
         <Border Name="border"
+                CornerRadius="{DynamicResource ControlCornerRadius}"
                 Background="{TemplateBinding Background}"
                 BorderBrush="{TemplateBinding BorderBrush}"
                 BorderThickness="{TemplateBinding BorderThickness}">