diff --git a/res/values-night/colors.xml b/res/values-night/colors.xml
index 2cdbd3f107a..3c829f41fed 100644
--- a/res/values-night/colors.xml
+++ b/res/values-night/colors.xml
@@ -21,8 +21,6 @@
     <color name="homepage_support_background">#3F5FBD</color>
     <color name="homepage_card_dismissal_background">@*android:color/material_grey_900</color>
     <color name="contextual_card_background">@*android:color/material_grey_900</color>
-    <!-- Dialog background color. -->
-    <color name="dialog_background">@*android:color/material_grey_800</color>
     <color name="notification_importance_selection_bg">@*android:color/material_grey_800</color>
     <color name="notification_importance_button_selected">#AECBFA</color> <!-- material blue 200 -->
     <color name="notification_importance_button_unselected">#5F6368</color>
diff --git a/res/values-night/themes.xml b/res/values-night/themes.xml
index d80b271d14b..9faaede1785 100644
--- a/res/values-night/themes.xml
+++ b/res/values-night/themes.xml
@@ -15,7 +15,8 @@
      limitations under the License.
 -->
 
-<resources>
+<resources
+    xmlns:androidprv="http://schemas.android.com/apk/prv/res/android">
 
     <style name="Theme.Settings.Home" parent="Theme.Settings.HomeBase">
         <item name="colorPrimary">@*android:color/primary_device_default_settings</item>
@@ -31,7 +32,7 @@
 
     <style name="Theme.AlertDialog.Base" parent="@style/Theme.AppCompat.DayNight.Dialog.Alert">
         <item name="colorAccent">@*android:color/accent_device_default_dark</item>
-        <item name="android:colorBackground">@color/dialog_background</item>
+        <item name="android:colorBackground">?androidprv:attr/colorSurface</item>
     </style>
 
     <!-- Material theme for the pages containing TabLayout and ViewPager -->
diff --git a/res/values/colors.xml b/res/values/colors.xml
index ab8489cd4e7..c4f28f7316c 100644
--- a/res/values/colors.xml
+++ b/res/values/colors.xml
@@ -147,9 +147,6 @@
     <!-- Search bar background color -->
     <color name="search_bar_background">?androidprv:attr/colorSurface</color>
 
-    <!-- Dialog background color -->
-    <color name="dialog_background">@*android:color/background_device_default_light</color>
-
     <color name="face_intro_outline">#ffdadce0</color>
 
     <color name="back_gesture_indicator">#4182ef</color>
diff --git a/res/values/themes.xml b/res/values/themes.xml
index 9681b030bcc..07ca82dfbe9 100644
--- a/res/values/themes.xml
+++ b/res/values/themes.xml
@@ -14,7 +14,8 @@
      limitations under the License.
 -->
 
-<resources>
+<resources
+    xmlns:androidprv="http://schemas.android.com/apk/prv/res/android">
 
     <style name="Transparent">
         <item name="alertDialogTheme">@style/Theme.AlertDialog</item>
@@ -129,7 +130,7 @@
 
     <style name="Theme.AlertDialog.Base" parent="@style/Theme.AppCompat.DayNight.Dialog.Alert">
         <item name="colorAccent">@*android:color/accent_device_default_light</item>
-        <item name="android:colorBackground">@color/dialog_background</item>
+        <item name="android:colorBackground">?androidprv:attr/colorSurface</item>
     </style>
 
     <style name="Theme.AlertDialog" parent="Theme.AlertDialog.Base">