diff --git a/quickstep/res/layout/taskbar.xml b/quickstep/res/layout/taskbar.xml
index 83ad9f3..3fdbfb2 100644
--- a/quickstep/res/layout/taskbar.xml
+++ b/quickstep/res/layout/taskbar.xml
@@ -30,6 +30,11 @@
         android:layout_gravity="bottom"
         android:clipChildren="false" />
 
+    <com.android.launcher3.taskbar.TaskbarScrimView
+        android:id="@+id/taskbar_scrim"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"/>
+
     <FrameLayout
         android:id="@+id/navbuttons_view"
         android:layout_width="match_parent"
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java
index ad0243c..e42bb7f 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java
@@ -124,6 +124,7 @@
         mDragLayer = (TaskbarDragLayer) mLayoutInflater.inflate(
                 R.layout.taskbar, null, false);
         TaskbarView taskbarView = mDragLayer.findViewById(R.id.taskbar_view);
+        TaskbarScrimView taskbarScrimView = mDragLayer.findViewById(R.id.taskbar_scrim);
         FrameLayout navButtonsView = mDragLayer.findViewById(R.id.navbuttons_view);
         StashedHandleView stashedHandleView = mDragLayer.findViewById(R.id.stashed_handle);
 
@@ -144,6 +145,7 @@
                         R.color.popup_color_primary_light),
                 new TaskbarDragLayerController(this, mDragLayer),
                 new TaskbarViewController(this, taskbarView),
+                new TaskbarScrimViewController(this, taskbarScrimView),
                 new TaskbarUnfoldAnimationController(unfoldTransitionProgressProvider,
                         mWindowManager),
                 new TaskbarKeyguardController(this),
@@ -322,6 +324,7 @@
                 mControllers.navbarButtonsViewController.isRecentsDisabled());
         mControllers.taskbarKeyguardController.updateStateForSysuiFlags(systemUiStateFlags);
         mControllers.taskbarStashController.updateStateForSysuiFlags(systemUiStateFlags);
+        mControllers.taskbarScrimViewController.updateStateForSysuiFlags(systemUiStateFlags);
     }
 
     public void onRotationProposal(int rotation, boolean isValid) {
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarControllers.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarControllers.java
index e49c6ae..e13f849 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarControllers.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarControllers.java
@@ -30,6 +30,7 @@
     public final NavbarButtonsViewController navbarButtonsViewController;
     public final RotationButtonController rotationButtonController;
     public final TaskbarDragLayerController taskbarDragLayerController;
+    public final TaskbarScrimViewController taskbarScrimViewController;
     public final TaskbarViewController taskbarViewController;
     public final TaskbarUnfoldAnimationController taskbarUnfoldAnimationController;
     public final TaskbarKeyguardController taskbarKeyguardController;
@@ -47,6 +48,7 @@
             RotationButtonController rotationButtonController,
             TaskbarDragLayerController taskbarDragLayerController,
             TaskbarViewController taskbarViewController,
+            TaskbarScrimViewController taskbarScrimViewController,
             TaskbarUnfoldAnimationController taskbarUnfoldAnimationController,
             TaskbarKeyguardController taskbarKeyguardController,
             StashedHandleViewController stashedHandleViewController,
@@ -59,6 +61,7 @@
         this.rotationButtonController = rotationButtonController;
         this.taskbarDragLayerController = taskbarDragLayerController;
         this.taskbarViewController = taskbarViewController;
+        this.taskbarScrimViewController = taskbarScrimViewController;
         this.taskbarUnfoldAnimationController = taskbarUnfoldAnimationController;
         this.taskbarKeyguardController = taskbarKeyguardController;
         this.stashedHandleViewController = stashedHandleViewController;
@@ -78,6 +81,7 @@
         }
         taskbarDragLayerController.init(this);
         taskbarViewController.init(this);
+        taskbarScrimViewController.init(this);
         taskbarUnfoldAnimationController.init(this);
         taskbarKeyguardController.init(navbarButtonsViewController);
         stashedHandleViewController.init(this);
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarScrimView.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarScrimView.java
new file mode 100644
index 0000000..94a3307
--- /dev/null
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarScrimView.java
@@ -0,0 +1,129 @@
+/*
+ * Copyright (C) 2021 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.
+ */
+package com.android.launcher3.taskbar;
+
+import android.content.Context;
+import android.graphics.Canvas;
+import android.graphics.Paint;
+import android.graphics.Path;
+import android.util.AttributeSet;
+import android.view.View;
+
+/**
+ * View that handles scrimming the taskbar and the inverted corners it draws. The scrim is used
+ * when bubbles is expanded.
+ */
+public class TaskbarScrimView extends View {
+    private final Paint mTaskbarScrimPaint;
+    private final Path mInvertedLeftCornerPath, mInvertedRightCornerPath;
+
+    private boolean mShowScrim;
+    private float mLeftCornerRadius, mRightCornerRadius;
+    private float mBackgroundHeight;
+
+    public TaskbarScrimView(Context context) {
+        this(context, null);
+    }
+
+    public TaskbarScrimView(Context context, AttributeSet attrs) {
+        this(context, attrs, 0);
+    }
+
+    public TaskbarScrimView(Context context, AttributeSet attrs, int defStyleAttr) {
+        this(context, attrs, defStyleAttr, 0);
+    }
+
+    public TaskbarScrimView(Context context, AttributeSet attrs, int defStyleAttr,
+            int defStyleRes) {
+        super(context, attrs, defStyleAttr, defStyleRes);
+
+        mTaskbarScrimPaint = new Paint();
+        mTaskbarScrimPaint.setColor(getResources().getColor(android.R.color.system_neutral1_1000));
+        mTaskbarScrimPaint.setFlags(Paint.ANTI_ALIAS_FLAG);
+        mTaskbarScrimPaint.setStyle(Paint.Style.FILL);
+
+        mInvertedLeftCornerPath = new Path();
+        mInvertedRightCornerPath = new Path();
+    }
+
+    @Override
+    protected void onDraw(Canvas canvas) {
+        super.onDraw(canvas);
+
+        if (mShowScrim) {
+            canvas.save();
+            canvas.translate(0, canvas.getHeight() - mBackgroundHeight);
+
+            // Scrim the taskbar itself.
+            canvas.drawRect(0, 0, canvas.getWidth(), mBackgroundHeight, mTaskbarScrimPaint);
+
+            // Scrim the inverted rounded corners above the taskbar.
+            canvas.translate(0, -mLeftCornerRadius);
+            canvas.drawPath(mInvertedLeftCornerPath, mTaskbarScrimPaint);
+            canvas.translate(0, mLeftCornerRadius);
+            canvas.translate(canvas.getWidth() - mRightCornerRadius, -mRightCornerRadius);
+            canvas.drawPath(mInvertedRightCornerPath, mTaskbarScrimPaint);
+
+            canvas.restore();
+        }
+    }
+
+    /**
+     * Sets the height of the taskbar background.
+     * @param height the height of the background.
+     */
+    protected void setBackgroundHeight(float height) {
+        mBackgroundHeight = height;
+        if (mShowScrim) {
+            invalidate();
+        }
+    }
+
+    /**
+     * Sets the alpha of the taskbar scrim.
+     * @param alpha the alpha of the scrim.
+     */
+    protected void setScrimAlpha(float alpha) {
+        mShowScrim = alpha > 0f;
+        mTaskbarScrimPaint.setAlpha((int) (alpha * 255));
+        invalidate();
+    }
+
+    /**
+     * Sets the radius of the left and right corners above the taskbar.
+     * @param leftCornerRadius the radius of the left corner.
+     * @param rightCornerRadius the radius of the right corner.
+     */
+    protected void setCornerSizes(float leftCornerRadius, float rightCornerRadius) {
+        mLeftCornerRadius = leftCornerRadius;
+        mRightCornerRadius = rightCornerRadius;
+
+        Path square = new Path();
+        square.addRect(0, 0, mLeftCornerRadius, mLeftCornerRadius, Path.Direction.CW);
+        Path circle = new Path();
+        circle.addCircle(mLeftCornerRadius, 0, mLeftCornerRadius, Path.Direction.CW);
+        mInvertedLeftCornerPath.op(square, circle, Path.Op.DIFFERENCE);
+        square.reset();
+        square.addRect(0, 0, mRightCornerRadius, mRightCornerRadius, Path.Direction.CW);
+        circle.reset();
+        circle.addCircle(0, 0, mRightCornerRadius, Path.Direction.CW);
+        mInvertedRightCornerPath.op(square, circle, Path.Op.DIFFERENCE);
+
+        if (mShowScrim) {
+            invalidate();
+        }
+    }
+}
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarScrimViewController.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarScrimViewController.java
new file mode 100644
index 0000000..e7e55ef
--- /dev/null
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarScrimViewController.java
@@ -0,0 +1,94 @@
+/*
+ * Copyright (C) 2021 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.
+ */
+package com.android.launcher3.taskbar;
+
+import static com.android.systemui.shared.system.QuickStepContract.SYSUI_STATE_BUBBLES_EXPANDED;
+import static com.android.systemui.shared.system.QuickStepContract.SYSUI_STATE_BUBBLES_MANAGE_MENU_EXPANDED;
+
+import android.animation.ObjectAnimator;
+import android.view.animation.Interpolator;
+import android.view.animation.PathInterpolator;
+
+import com.android.quickstep.AnimatedFloat;
+import com.android.quickstep.SystemUiProxy;
+
+/**
+ * Handles properties/data collection, and passes the results to {@link TaskbarScrimView} to render.
+ */
+public class TaskbarScrimViewController {
+
+    private static final float SCRIM_ALPHA = 0.6f;
+
+    private static final Interpolator SCRIM_ALPHA_IN = new PathInterpolator(0.4f, 0f, 1f, 1f);
+    private static final Interpolator SCRIM_ALPHA_OUT = new PathInterpolator(0f, 0f, 0.8f, 1f);
+
+    private final TaskbarActivityContext mActivity;
+    private final TaskbarScrimView mScrimView;
+
+    // Alpha property for the scrim.
+    private final AnimatedFloat mScrimAlpha = new AnimatedFloat(this::updateScrimAlpha);
+
+    // Initialized in init.
+    private TaskbarControllers mControllers;
+
+    public TaskbarScrimViewController(TaskbarActivityContext activity, TaskbarScrimView scrimView) {
+        mActivity = activity;
+        mScrimView = scrimView;
+        mScrimView.setCornerSizes(mActivity.getLeftCornerRadius(),
+                mActivity.getRightCornerRadius());
+        mScrimView.setBackgroundHeight(mActivity.getDeviceProfile().taskbarSize);
+    }
+
+    /**
+     * Initializes the controller
+     */
+    public void init(TaskbarControllers controllers) {
+        mControllers = controllers;
+    }
+
+    /**
+     * Updates the scrim state based on the flags.
+     */
+    public void updateStateForSysuiFlags(int stateFlags) {
+        final boolean bubblesExpanded = (stateFlags & SYSUI_STATE_BUBBLES_EXPANDED) != 0;
+        final boolean manageMenuExpanded =
+                (stateFlags & SYSUI_STATE_BUBBLES_MANAGE_MENU_EXPANDED) != 0;
+        final boolean showScrim = !mControllers.navbarButtonsViewController.isImeVisible()
+                && bubblesExpanded && mControllers.taskbarStashController.isInAppAndNotStashed();
+        final float scrimAlpha = manageMenuExpanded
+                // When manage menu shows there's the first scrim and second scrim so figure out
+                // what the total transparency would be.
+                ? (SCRIM_ALPHA + (SCRIM_ALPHA * (1 - SCRIM_ALPHA)))
+                : showScrim ? SCRIM_ALPHA : 0;
+        showScrim(showScrim, scrimAlpha);
+    }
+
+    private void showScrim(boolean showScrim, float alpha) {
+        mScrimView.setOnClickListener(showScrim ? (view) -> onClick() : null);
+        mScrimView.setClickable(showScrim);
+        ObjectAnimator anim = mScrimAlpha.animateToValue(showScrim ? alpha : 0);
+        anim.setInterpolator(showScrim ? SCRIM_ALPHA_IN : SCRIM_ALPHA_OUT);
+        anim.start();
+    }
+
+    private void updateScrimAlpha() {
+        mScrimView.setScrimAlpha(mScrimAlpha.value);
+    }
+
+    private void onClick() {
+        SystemUiProxy.INSTANCE.get(mActivity).onBackPressed();
+    }
+}
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarStashController.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarStashController.java
index 6d6f0f2..d71625e 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarStashController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarStashController.java
@@ -198,6 +198,14 @@
         return (flags & flagMask) != 0;
     }
 
+
+    /**
+     * Returns whether the taskbar is currently visible and in an app.
+     */
+    public boolean isInAppAndNotStashed() {
+        return !mIsStashed && (mState & FLAG_IN_APP) != 0;
+    }
+
     public int getContentHeight() {
         return isStashed() ? mStashedHeight : mUnstashedHeight;
     }