diff --git a/res/values/arrays.xml b/res/values/arrays.xml
index cb6f9be5d04..0ccbbf44aa0 100644
--- a/res/values/arrays.xml
+++ b/res/values/arrays.xml
@@ -1079,4 +1079,18 @@
         <item>2</item>
     </string-array>
 
+    <!-- Titles for ui dark mode preference. -->
+    <string-array name="dark_ui_mode_entries" >
+        <item>Automatic (based on time of day)</item>
+        <item>Always on</item>
+        <item>Always off</item>
+    </string-array>
+
+    <!-- Values for ui dark mode preference. -->
+    <string-array name="dark_ui_mode_values" translatable="false" >
+        <item>auto</item>
+        <item>yes</item>
+        <item>no</item>
+    </string-array>
+
 </resources>
diff --git a/res/values/strings.xml b/res/values/strings.xml
index 0bb5e37928d..7fb4b6000c4 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -8887,6 +8887,12 @@
     <!-- [CHAR LIMIT=60] Name of dev option called "System UI demo mode" -->
     <string name="demo_mode">System UI demo mode</string>
 
+    <!-- [CHAR LIMIT=60] Name of dev option that changes the UI Mode -->
+    <string name="dark_ui_mode">Night mode</string>
+
+    <!-- [CHAR LIMIT=60] Name of dev option that changes the color of the UI -->
+    <string name="dark_ui_mode_title">Set Night mode</string>
+
     <!-- [CHAR LIMIT=60] Name of dev option to enable extra quick settings tiles -->
     <string name="quick_settings_developer_tiles">Quick settings developer tiles</string>
 
diff --git a/res/xml/development_settings.xml b/res/xml/development_settings.xml
index eebfa8a7b82..571f38ef509 100644
--- a/res/xml/development_settings.xml
+++ b/res/xml/development_settings.xml
@@ -112,6 +112,13 @@
             <intent android:action="com.android.settings.action.DEMO_MODE" />
         </Preference>
 
+        <ListPreference
+            android:key="dark_ui_mode"
+            android:title="@string/dark_ui_mode"
+            android:dialogTitle="@string/dark_ui_mode_title"
+            android:entries="@array/dark_ui_mode_entries"
+            android:entryValues="@array/dark_ui_mode_values" />
+
         <Preference
             android:key="quick_settings_tiles"
             android:title="@string/quick_settings_developer_tiles"
diff --git a/src/com/android/settings/development/DarkUIPreferenceController.java b/src/com/android/settings/development/DarkUIPreferenceController.java
new file mode 100644
index 00000000000..a35397b7815
--- /dev/null
+++ b/src/com/android/settings/development/DarkUIPreferenceController.java
@@ -0,0 +1,107 @@
+/*
+ * Copyright (C) 2018 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.settings.development;
+
+import android.app.UiModeManager;
+import android.content.Context;
+import android.support.annotation.VisibleForTesting;
+import android.support.v7.preference.ListPreference;
+import android.support.v7.preference.Preference;
+
+import com.android.settings.R;
+import com.android.settings.core.PreferenceControllerMixin;
+import com.android.settingslib.development.DeveloperOptionsPreferenceController;
+
+public class DarkUIPreferenceController extends
+        DeveloperOptionsPreferenceController implements Preference.OnPreferenceChangeListener,
+        PreferenceControllerMixin {
+
+    private static final String DARK_UI_KEY = "dark_ui_mode";
+    private final UiModeManager mUiModeManager;
+
+    public DarkUIPreferenceController(Context context) {
+        this(context, context.getSystemService(UiModeManager.class));
+    }
+
+    @VisibleForTesting
+    DarkUIPreferenceController(Context context, UiModeManager uiModeManager) {
+        super(context);
+        mUiModeManager = uiModeManager;
+    }
+
+    @Override
+    public String getPreferenceKey() {
+        return DARK_UI_KEY;
+    }
+
+    @Override
+    public boolean onPreferenceChange(Preference preference, Object newValue) {
+        mUiModeManager.setNightMode(modeToInt((String) newValue));
+        updateSummary(preference);
+        return true;
+    }
+
+    @Override
+    public void updateState(Preference preference) {
+        updateSummary(preference);
+    }
+
+    private void updateSummary(Preference preference) {
+        int mode = mUiModeManager.getNightMode();
+        ((ListPreference) preference).setValue(modeToString(mode));
+        preference.setSummary(modeToDescription(mode));
+    }
+
+    private String modeToDescription(int mode) {
+        String[] values = mContext.getResources().getStringArray(R.array.dark_ui_mode_entries);
+        switch (mode) {
+            case UiModeManager.MODE_NIGHT_AUTO:
+                return values[0];
+            case UiModeManager.MODE_NIGHT_YES:
+                return values[1];
+            case UiModeManager.MODE_NIGHT_NO:
+            default:
+                return values[2];
+
+        }
+    }
+
+    private String modeToString(int mode) {
+        switch (mode) {
+            case UiModeManager.MODE_NIGHT_AUTO:
+                return "auto";
+            case UiModeManager.MODE_NIGHT_YES:
+                return "yes";
+            case UiModeManager.MODE_NIGHT_NO:
+            default:
+                return "no";
+
+        }
+    }
+
+    private int modeToInt(String mode) {
+        switch (mode) {
+            case "auto":
+                return UiModeManager.MODE_NIGHT_AUTO;
+            case "yes":
+                return UiModeManager.MODE_NIGHT_YES;
+            case "no":
+            default:
+                return UiModeManager.MODE_NIGHT_NO;
+        }
+    }
+}
diff --git a/src/com/android/settings/development/DevelopmentSettingsDashboardFragment.java b/src/com/android/settings/development/DevelopmentSettingsDashboardFragment.java
index 3fca7312b2c..1c9e36bfb2e 100644
--- a/src/com/android/settings/development/DevelopmentSettingsDashboardFragment.java
+++ b/src/com/android/settings/development/DevelopmentSettingsDashboardFragment.java
@@ -375,6 +375,7 @@ public class DevelopmentSettingsDashboardFragment extends RestrictedDashboardFra
         controllers.add(new LocalBackupPasswordPreferenceController(context));
         controllers.add(new StayAwakePreferenceController(context, lifecycle));
         controllers.add(new HdcpCheckingPreferenceController(context));
+        controllers.add(new DarkUIPreferenceController(context));
         controllers.add(new BluetoothSnoopLogPreferenceController(context));
         controllers.add(new OemUnlockPreferenceController(context, activity, fragment));
         controllers.add(new FileEncryptionPreferenceController(context));
diff --git a/tests/robotests/src/com/android/settings/development/DarkUIPreferenceControllerTest.java b/tests/robotests/src/com/android/settings/development/DarkUIPreferenceControllerTest.java
new file mode 100644
index 00000000000..47b966a9b7b
--- /dev/null
+++ b/tests/robotests/src/com/android/settings/development/DarkUIPreferenceControllerTest.java
@@ -0,0 +1,85 @@
+/*
+ * Copyright (C) 2018 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.settings.development;
+
+import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import android.app.UiModeManager;
+import android.content.Context;
+import android.support.v7.preference.ListPreference;
+import android.support.v7.preference.PreferenceScreen;
+
+import com.android.settings.TestConfig;
+import com.android.settings.testutils.SettingsRobolectricTestRunner;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+import org.robolectric.RuntimeEnvironment;
+import org.robolectric.annotation.Config;
+
+@RunWith(SettingsRobolectricTestRunner.class)
+@Config(manifest = TestConfig.MANIFEST_PATH,
+        sdk = TestConfig.SDK_VERSION)
+public class DarkUIPreferenceControllerTest {
+
+    private Context mContext;
+    @Mock
+    private ListPreference mPreference;
+    @Mock
+    private PreferenceScreen mPreferenceScreen;
+    @Mock
+    private UiModeManager mUiModeManager;
+    private DarkUIPreferenceController mController;
+
+    @Before
+    public void setup() {
+        MockitoAnnotations.initMocks(this);
+        mContext = RuntimeEnvironment.application;
+        mController = new DarkUIPreferenceController(mContext, mUiModeManager);
+        when(mPreferenceScreen.findPreference(mController.getPreferenceKey())).thenReturn(
+                mPreference);
+        mController.displayPreference(mPreferenceScreen);
+    }
+
+    @Test
+    public void onPreferenceChanged_setAuto() {
+        mController.onPreferenceChange(mPreference, "auto");
+        verify(mUiModeManager).setNightMode(eq(UiModeManager.MODE_NIGHT_AUTO));
+    }
+
+    @Test
+    public void onPreferenceChanged_setNightMode() {
+        mController.onPreferenceChange(mPreference, "yes");
+        verify(mUiModeManager).setNightMode(eq(UiModeManager.MODE_NIGHT_YES));
+    }
+
+    @Test
+    public void onPreferenceChanged_setDayMode() {
+        mController.onPreferenceChange(mPreference, "no");
+        verify(mUiModeManager).setNightMode(eq(UiModeManager.MODE_NIGHT_NO));
+    }
+
+    public int getCurrentMode() {
+        final UiModeManager uiModeManager = mContext.getSystemService(UiModeManager.class);
+        return uiModeManager.getNightMode();
+    }
+}