diff --git a/twidere/build.gradle b/twidere/build.gradle
index 7dd47212b..16a5c12ef 100644
--- a/twidere/build.gradle
+++ b/twidere/build.gradle
@@ -171,7 +171,7 @@ dependencies {
     compile "com.github.mariotaku.CommonsLibrary:text:$mariotaku_commons_library_version"
     compile "com.github.mariotaku.CommonsLibrary:text-kotlin:$mariotaku_commons_library_version"
     compile 'com.github.mariotaku:KPreferences:0.9.5'
-    compile 'com.github.mariotaku:Chameleon:0.9.6'
+    compile 'com.github.mariotaku:Chameleon:0.9.7-SNAPSHOT'
     compile "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
     compile 'nl.komponents.kovenant:kovenant:3.3.0'
     compile 'nl.komponents.kovenant:kovenant-android:3.3.0'
diff --git a/twidere/src/main/java/org/mariotaku/twidere/util/ThemeUtils.java b/twidere/src/main/java/org/mariotaku/twidere/util/ThemeUtils.java
index 862050cd2..03c1c5566 100644
--- a/twidere/src/main/java/org/mariotaku/twidere/util/ThemeUtils.java
+++ b/twidere/src/main/java/org/mariotaku/twidere/util/ThemeUtils.java
@@ -20,7 +20,6 @@
 package org.mariotaku.twidere.util;
 
 import android.content.Context;
-import android.content.res.Configuration;
 import android.content.res.Resources;
 import android.content.res.TypedArray;
 import android.graphics.Color;
@@ -540,15 +539,6 @@ public class ThemeUtils implements Constants {
         }
     }
 
-    public static void fixNightMode(Resources resources, Configuration newConfig) {
-        int currentNightMode = resources.getConfiguration().uiMode
-                & Configuration.UI_MODE_NIGHT_MASK;
-
-        if (currentNightMode == Configuration.UI_MODE_NIGHT_YES)
-            newConfig.uiMode = (newConfig.uiMode & ~Configuration.UI_MODE_NIGHT_MASK)
-                    | Configuration.UI_MODE_NIGHT_YES;
-    }
-
     public static int getColorDependent(int color) {
         return ChameleonUtils.getColorDependent(color);
     }
diff --git a/twidere/src/main/kotlin/org/mariotaku/twidere/activity/BaseActivity.kt b/twidere/src/main/kotlin/org/mariotaku/twidere/activity/BaseActivity.kt
index fea6cffb8..9ff364e6f 100644
--- a/twidere/src/main/kotlin/org/mariotaku/twidere/activity/BaseActivity.kt
+++ b/twidere/src/main/kotlin/org/mariotaku/twidere/activity/BaseActivity.kt
@@ -29,6 +29,7 @@ import android.graphics.Rect
 import android.nfc.NfcAdapter
 import android.os.Bundle
 import android.support.annotation.StyleRes
+import android.support.v4.graphics.ColorUtils
 import android.support.v7.preference.Preference
 import android.support.v7.preference.PreferenceFragmentCompat
 import android.support.v7.preference.PreferenceFragmentCompat.OnPreferenceDisplayDialogCallback
@@ -102,6 +103,10 @@ open class BaseActivity : ChameleonActivity(), IExtendedActivity, IThemedActivit
         if (theme.isToolbarColored) {
             theme.colorToolbar = theme.colorPrimary
         }
+        if (ThemeUtils.isTransparentBackground(themeBackgroundOption)) {
+            theme.colorToolbar = ColorUtils.setAlphaComponent(theme.colorToolbar,
+                    ThemeUtils.getActionBarAlpha(ThemeUtils.getUserThemeBackgroundAlpha(this)))
+        }
         theme.statusBarColor = ChameleonUtils.darkenColor(theme.colorToolbar)
         theme.lightStatusBarMode = LightStatusBarMode.AUTO
         theme.textColorLink = ThemeUtils.getOptimalAccentColor(theme.colorAccent, theme.colorForeground)
diff --git a/twidere/src/main/kotlin/org/mariotaku/twidere/app/TwidereApplication.kt b/twidere/src/main/kotlin/org/mariotaku/twidere/app/TwidereApplication.kt
index 42dd58519..58cde45ac 100644
--- a/twidere/src/main/kotlin/org/mariotaku/twidere/app/TwidereApplication.kt
+++ b/twidere/src/main/kotlin/org/mariotaku/twidere/app/TwidereApplication.kt
@@ -27,7 +27,6 @@ import android.database.sqlite.SQLiteDatabase
 import android.database.sqlite.SQLiteOpenHelper
 import android.os.AsyncTask
 import android.support.multidex.MultiDex
-import android.support.v7.app.AppCompatDelegate
 import android.util.Log
 import nl.komponents.kovenant.android.startKovenant
 import nl.komponents.kovenant.android.stopKovenant
@@ -48,7 +47,6 @@ import org.mariotaku.twidere.activity.MainHondaJOJOActivity
 import org.mariotaku.twidere.constant.apiLastChangeKey
 import org.mariotaku.twidere.constant.bugReportsKey
 import org.mariotaku.twidere.constant.defaultFeatureLastUpdated
-import org.mariotaku.twidere.constant.nightModeKey
 import org.mariotaku.twidere.model.DefaultFeatures
 import org.mariotaku.twidere.util.*
 import org.mariotaku.twidere.util.content.TwidereSQLiteOpenHelper
@@ -99,7 +97,6 @@ class TwidereApplication : Application(), Constants, OnSharedPreferenceChangeLis
             StrictModeUtils.detectAllVmPolicy()
         }
         super.onCreate()
-        AppCompatDelegate.setDefaultNightMode(sharedPreferences[nightModeKey])
         startKovenant()
         initializeAsyncTask()
         initDebugMode()
@@ -234,9 +231,6 @@ class TwidereApplication : Application(), Constants, OnSharedPreferenceChangeLis
             KEY_SAME_OAUTH_SIGNING_URL, KEY_THUMBOR_ENABLED, KEY_THUMBOR_ADDRESS, KEY_THUMBOR_SECURITY_KEY -> {
                 preferences[apiLastChangeKey] = System.currentTimeMillis()
             }
-            KEY_THEME -> {
-                AppCompatDelegate.setDefaultNightMode(preferences[nightModeKey])
-            }
             KEY_EMOJI_SUPPORT -> {
                 externalThemeManager.reloadEmojiPreferences()
             }
diff --git a/twidere/src/main/kotlin/org/mariotaku/twidere/constant/PreferenceKeys.kt b/twidere/src/main/kotlin/org/mariotaku/twidere/constant/PreferenceKeys.kt
index c11404120..9700392c4 100644
--- a/twidere/src/main/kotlin/org/mariotaku/twidere/constant/PreferenceKeys.kt
+++ b/twidere/src/main/kotlin/org/mariotaku/twidere/constant/PreferenceKeys.kt
@@ -10,11 +10,11 @@ import org.mariotaku.twidere.BuildConfig
 import org.mariotaku.twidere.Constants.KEY_DISPLAY_PROFILE_IMAGE
 import org.mariotaku.twidere.Constants.KEY_NO_CLOSE_AFTER_TWEET_SENT
 import org.mariotaku.twidere.TwidereConstants.*
-import org.mariotaku.twidere.constant.SharedPreferenceConstants.KEY_THEME
 import org.mariotaku.twidere.extension.getNonEmptyString
 import org.mariotaku.twidere.model.CustomAPIConfig
 import org.mariotaku.twidere.model.account.cred.Credentials
 import org.mariotaku.twidere.model.sync.SyncProviderInfo
+import org.mariotaku.twidere.preference.ThemeBackgroundPreference
 import org.mariotaku.twidere.util.sync.SyncProviderInfoFactory
 import org.mariotaku.twidere.view.ProfileImageView
 
@@ -77,6 +77,19 @@ object nightModeKey : KSimpleKey<Int>(KEY_THEME, AppCompatDelegate.MODE_NIGHT_NO
     }
 }
 
+object themeBackgroundAlphaKey : KSimpleKey<Int>(KEY_THEME_BACKGROUND_ALPHA, 0xFF) {
+    override fun read(preferences: SharedPreferences): Int {
+        return preferences.getInt(KEY_THEME_BACKGROUND_ALPHA, DEFAULT_THEME_BACKGROUND_ALPHA)
+                .coerceIn(ThemeBackgroundPreference.MIN_ALPHA, ThemeBackgroundPreference.MAX_ALPHA)
+    }
+
+    override fun write(editor: SharedPreferences.Editor, value: Int): Boolean {
+        editor.putInt(key, value.coerceIn(ThemeBackgroundPreference.MIN_ALPHA,
+                ThemeBackgroundPreference.MAX_ALPHA))
+        return true
+    }
+}
+
 object profileImageStyleKey : KSimpleKey<Int>(KEY_PROFILE_IMAGE_STYLE, ProfileImageView.SHAPE_CIRCLE) {
     override fun read(preferences: SharedPreferences): Int {
         if (preferences.getString(key, null) == VALUE_PROFILE_IMAGE_STYLE_SQUARE) return ProfileImageView.SHAPE_RECTANGLE
diff --git a/twidere/src/main/kotlin/org/mariotaku/twidere/fragment/UserFragment.kt b/twidere/src/main/kotlin/org/mariotaku/twidere/fragment/UserFragment.kt
index 19dc0e0b1..00cec2092 100644
--- a/twidere/src/main/kotlin/org/mariotaku/twidere/fragment/UserFragment.kt
+++ b/twidere/src/main/kotlin/org/mariotaku/twidere/fragment/UserFragment.kt
@@ -48,6 +48,7 @@ import android.support.v4.app.LoaderManager.LoaderCallbacks
 import android.support.v4.content.AsyncTaskLoader
 import android.support.v4.content.Loader
 import android.support.v4.content.res.ResourcesCompat
+import android.support.v4.graphics.ColorUtils
 import android.support.v4.view.ViewCompat
 import android.support.v4.view.ViewPager.OnPageChangeListener
 import android.support.v4.view.WindowCompat
@@ -1292,9 +1293,9 @@ class UserFragment : BaseSupportFragment(), OnClickListener, OnLinkClickListener
         }
         val taskColor: Int
         if (theme.isToolbarColored) {
-            taskColor = color
+            taskColor = ColorUtils.setAlphaComponent(color, 0xFF)
         } else {
-            taskColor = theme.colorToolbar
+            taskColor = ColorUtils.setAlphaComponent(theme.colorToolbar, 0xFF)
         }
         if (user != null) {
             val name = userColorNameManager.getDisplayName(user, nameFirst)
diff --git a/twidere/src/main/res/layout/activity_home_content.xml b/twidere/src/main/res/layout/activity_home_content.xml
index d99a29d59..8fc23c1b1 100644
--- a/twidere/src/main/res/layout/activity_home_content.xml
+++ b/twidere/src/main/res/layout/activity_home_content.xml
@@ -38,6 +38,7 @@
         android:layout_width="match_parent"
         android:layout_height="?actionBarSize"
         android:layout_alignParentTop="true"
+        android:background="?colorToolbar"
         android:elevation="@dimen/toolbar_elevation"
         app:contentInsetEnd="0dp"
         app:contentInsetStart="0dp">