diff --git a/core/res/res/drawable/accessibility_magnification_thumbnail_background_bg.xml b/core/res/res/drawable/accessibility_magnification_thumbnail_background_bg.xml
index 7b82b4de3979f..bb6dc468b163b 100644
--- a/core/res/res/drawable/accessibility_magnification_thumbnail_background_bg.xml
+++ b/core/res/res/drawable/accessibility_magnification_thumbnail_background_bg.xml
@@ -14,13 +14,13 @@
      limitations under the License.
 -->
 <layer-list xmlns:android="http://schemas.android.com/apk/res/android">
-<item>
+  <item>
     <shape android:shape="rectangle">
-        <stroke
-            android:width="1dp"
-            android:color="@color/accessibility_magnification_thumbnail_stroke_color" />
-        <corners android:radius="4dp"/>
-        <solid android:color="@color/accessibility_magnification_thumbnail_background_color" />
+      <stroke
+          android:width="@dimen/accessibility_magnification_thumbnail_container_stroke_width"
+          android:color="@color/accessibility_magnification_thumbnail_container_stroke_color" />
+      <corners android:radius="8dp"/>
+      <solid android:color="@color/accessibility_magnification_thumbnail_container_background_color" />
     </shape>
-</item>
+  </item>
 </layer-list>
diff --git a/core/res/res/drawable/accessibility_magnification_thumbnail_background_fg.xml b/core/res/res/drawable/accessibility_magnification_thumbnail_background_fg.xml
new file mode 100644
index 0000000000000..ef77b341dbaa8
--- /dev/null
+++ b/core/res/res/drawable/accessibility_magnification_thumbnail_background_fg.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2023 The Android Open Source Project
+
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+
+          http://www.apache.org/licenses/LICENSE-2.0
+
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+  <item>
+    <shape android:shape="rectangle">
+      <!-- We draw the border as a foreground too so the thumbnail doesn't encroach and overlap
+          the rounded corners.
+          We also draw it on the background, otherwise you can see a tiny bit of the black fill
+          poking out around the white border. -->
+      <stroke
+          android:width="@dimen/accessibility_magnification_thumbnail_container_stroke_width"
+          android:color="@color/accessibility_magnification_thumbnail_container_stroke_color" />
+      <corners android:radius="8dp"/>
+    </shape>
+  </item>
+</layer-list>
diff --git a/core/res/res/drawable/accessibility_magnification_thumbnail_bg.xml b/core/res/res/drawable/accessibility_magnification_thumbnail_bg.xml
index 77ba94ea0db75..cf0aee573908d 100644
--- a/core/res/res/drawable/accessibility_magnification_thumbnail_bg.xml
+++ b/core/res/res/drawable/accessibility_magnification_thumbnail_bg.xml
@@ -14,10 +14,13 @@
      limitations under the License.
 -->
 <layer-list xmlns:android="http://schemas.android.com/apk/res/android">
-<item>
+  <item>
     <shape android:shape="rectangle">
-        <corners android:radius="2dp"/>
-        <solid android:color="@color/accessibility_magnification_thumbnail_color" />
+      <stroke
+          android:width="2dp"
+          android:color="@color/accessibility_magnification_thumbnail_stroke_color" />
+      <corners android:radius="2dp"/>
+      <solid android:color="@color/accessibility_magnification_thumbnail_background_color" />
     </shape>
-</item>
+  </item>
 </layer-list>
diff --git a/core/res/res/layout/thumbnail_background_view.xml b/core/res/res/layout/thumbnail_background_view.xml
index 0ba01e9cd9487..423af837bed66 100644
--- a/core/res/res/layout/thumbnail_background_view.xml
+++ b/core/res/res/layout/thumbnail_background_view.xml
@@ -16,8 +16,12 @@
 <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="wrap_content"
     android:layout_height="wrap_content"
-    android:background="@drawable/accessibility_magnification_thumbnail_background_bg">
+    android:background="@drawable/accessibility_magnification_thumbnail_background_bg"
+    android:foreground="@drawable/accessibility_magnification_thumbnail_background_fg"
+    android:padding="@dimen/accessibility_magnification_thumbnail_container_stroke_width"
+>
     <View
+        android:padding="@dimen/accessibility_magnification_thumbnail_container_stroke_width"
         android:id="@+id/accessibility_magnification_thumbnail_view"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
diff --git a/core/res/res/values/colors.xml b/core/res/res/values/colors.xml
index dc7565894f8f5..31e5f32658238 100644
--- a/core/res/res/values/colors.xml
+++ b/core/res/res/values/colors.xml
@@ -559,9 +559,10 @@
     <color name="accessibility_color_inversion_background">#546E7A</color>
 
     <!-- Fullscreen magnification thumbnail color -->
-    <color name="accessibility_magnification_thumbnail_stroke_color">#E0E0E0</color>
-    <color name="accessibility_magnification_thumbnail_background_color">#FCFCFC</color>
-    <color name="accessibility_magnification_thumbnail_color">#252525</color>
+    <color name="accessibility_magnification_thumbnail_stroke_color">#0C0C0C</color>
+    <color name="accessibility_magnification_thumbnail_background_color">#B3FFFFFF</color>
+    <color name="accessibility_magnification_thumbnail_container_background_color">#99000000</color>
+    <color name="accessibility_magnification_thumbnail_container_stroke_color">#FFFFFF</color>
 
     <!-- Color of camera light when camera is in use -->
     <color name="camera_privacy_light_day">#FFFFFF</color>
diff --git a/core/res/res/values/dimens.xml b/core/res/res/values/dimens.xml
index 5bb86dc4b4045..b1b1edf85a09b 100644
--- a/core/res/res/values/dimens.xml
+++ b/core/res/res/values/dimens.xml
@@ -609,6 +609,9 @@
     <!-- padding of fullscreen magnification thumbnail -->
     <dimen name="accessibility_magnification_thumbnail_padding">12dp</dimen>
 
+    <!-- width of the border of the magnification thumbnail -->
+    <dimen name="accessibility_magnification_thumbnail_container_stroke_width">4dp</dimen>
+
     <!-- The padding ratio of the Accessibility icon foreground drawable -->
     <item name="accessibility_icon_foreground_padding_ratio" type="dimen">21.88%</item>
 
diff --git a/core/res/res/values/symbols.xml b/core/res/res/values/symbols.xml
index 226ddb61196f4..0fbc9f6b96198 100644
--- a/core/res/res/values/symbols.xml
+++ b/core/res/res/values/symbols.xml
@@ -4515,10 +4515,13 @@
   <!-- FullScreenMagnification thumbnail -->
   <java-symbol type="layout" name="thumbnail_background_view" />
   <java-symbol type="drawable" name="accessibility_magnification_thumbnail_background_bg" />
+  <java-symbol type="drawable" name="accessibility_magnification_thumbnail_background_fg" />
   <java-symbol type="drawable" name="accessibility_magnification_thumbnail_bg" />
   <java-symbol type="color" name="accessibility_magnification_thumbnail_stroke_color" />
   <java-symbol type="color" name="accessibility_magnification_thumbnail_background_color" />
-  <java-symbol type="color" name="accessibility_magnification_thumbnail_color" />
+  <java-symbol type="color" name="accessibility_magnification_thumbnail_container_background_color" />
+  <java-symbol type="color" name="accessibility_magnification_thumbnail_container_stroke_color" />
+  <java-symbol type="dimen" name="accessibility_magnification_thumbnail_container_stroke_width" />
   <java-symbol type="dimen" name="accessibility_magnification_thumbnail_padding" />
   <java-symbol type="id" name="accessibility_magnification_thumbnail_view" />
   <!-- Package with global data query permissions for AppSearch -->
diff --git a/services/accessibility/java/com/android/server/accessibility/magnification/MagnificationThumbnail.java b/services/accessibility/java/com/android/server/accessibility/magnification/MagnificationThumbnail.java
index fe7b11ffb4c8f..5a783f47ccdc9 100644
--- a/services/accessibility/java/com/android/server/accessibility/magnification/MagnificationThumbnail.java
+++ b/services/accessibility/java/com/android/server/accessibility/magnification/MagnificationThumbnail.java
@@ -63,7 +63,7 @@ public class MagnificationThumbnail {
     private final WindowManager.LayoutParams mBackgroundParams;
     private boolean mVisible = false;
 
-    private static final float ASPECT_RATIO = 28f;
+    private static final float ASPECT_RATIO = 14f;
     private static final float BG_ASPECT_RATIO = ASPECT_RATIO / 2f;
 
     private ObjectAnimator mThumbNailAnimator;
@@ -261,9 +261,10 @@ public class MagnificationThumbnail {
             mThumbNailView.setScaleY(scaleDown);
         }
         if (!Float.isNaN(centerX)) {
+            var padding = mThumbNailView.getPaddingTop();
             var ratio = 1f / BG_ASPECT_RATIO;
-            var centerXScaled = centerX * ratio - mThumbNailView.getWidth() / 2f;
-            var centerYScaled = centerY * ratio - mThumbNailView.getHeight() / 2f;
+            var centerXScaled = centerX * ratio - (mThumbNailView.getWidth() / 2f + padding);
+            var centerYScaled = centerY * ratio - (mThumbNailView.getHeight() / 2f + padding);
 
             if (DEBUG) {
                 Log.d(