diff --git a/res/values/strings.xml b/res/values/strings.xml
index 96d0d68..f7f3a8b 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -4,6 +4,7 @@
   <string name="app_name" product="default">Unexpected Keyboard</string>
   <string name="settings_activity_label">Unexpected Keyboard Settings</string>
   <string name="pref_category_layout">Layout</string>
+  <string name="pref_label_brightness">Adjust label brightness</string>
   <string name="pref_layout_title">Change keyboard layout</string>
   <string name="pref_layout_e_system">System settings</string>
   <string name="pref_accents_title">Accents</string>
diff --git a/res/xml/settings.xml b/res/xml/settings.xml
index 046b23f..4920d6c 100644
--- a/res/xml/settings.xml
+++ b/res/xml/settings.xml
@@ -41,6 +41,7 @@
   </PreferenceCategory>
   <PreferenceCategory android:title="@string/pref_category_style">
     <ListPreference android:key="theme" android:title="@string/pref_theme" android:summary="%s" android:defaultValue="system" android:entries="@array/pref_theme_entries" android:entryValues="@array/pref_theme_values"/>
+    <juloo.common.IntSlideBarPreference android:key="label_brightness" android:title="@string/pref_label_brightness" android:summary="%s%%" android:defaultValue="100" min="50" max="100"/>
     <juloo.common.IntSlideBarPreference android:key="margin_bottom" android:title="@string/pref_margin_bottom_title" android:summary="%sdp" android:defaultValue="5" min="0" max="100"/>
     <juloo.common.IntSlideBarPreference android:key="keyboard_height" android:title="@string/pref_keyboard_height_title" android:summary="%s%%" android:defaultValue="35" min="25" max="50"/>
     <juloo.common.IntSlideBarPreference android:key="keyboard_height_landscape" android:title="@string/pref_keyboard_height_landscape_title" android:summary="%s%%" android:defaultValue="50" min="35" max="65"/>
diff --git a/srcs/juloo.keyboard2/Config.java b/srcs/juloo.keyboard2/Config.java
index 76415b7..b2c23a5 100644
--- a/srcs/juloo.keyboard2/Config.java
+++ b/srcs/juloo.keyboard2/Config.java
@@ -36,6 +36,7 @@ final class Config
   public float horizontalMargin;
   public float keyVerticalInterval;
   public float keyHorizontalInterval;
+  public int labelBrightness; // 0 - 255
   public boolean preciseRepeat;
   public boolean double_tap_lock_shift;
   public float characterSize; // Ratio
@@ -131,6 +132,8 @@ final class Config
     keyHorizontalInterval =
       getDipPref(dm, _prefs, "key_horizontal_space", keyHorizontalInterval)
       * horizontalIntervalScale;
+    // Label brightness is used as the alpha channel
+    labelBrightness = _prefs.getInt("label_brightness", 100) * 255 / 100;
     // Do not substract keyVerticalInterval from keyHeight because this is done
     // during rendered.
     keyHeight = dm.heightPixels * keyboardHeightPercent / 100 / 4;
diff --git a/srcs/juloo.keyboard2/Keyboard2View.java b/srcs/juloo.keyboard2/Keyboard2View.java
index 2430c3d..dcaf0f5 100644
--- a/srcs/juloo.keyboard2/Keyboard2View.java
+++ b/srcs/juloo.keyboard2/Keyboard2View.java
@@ -327,6 +327,7 @@ public class Keyboard2View extends View
     float textSize = scaleTextSize(kv, _config.labelTextSize, keyH);
     Paint p = _theme.labelPaint(kv.hasFlags(KeyValue.FLAG_KEY_FONT));
     p.setColor(labelColor(kv, isKeyDown, false));
+    p.setAlpha(_config.labelBrightness);
     p.setTextSize(textSize);
     canvas.drawText(kv.getString(), x, (keyH - p.ascent() - p.descent()) / 2f + y, p);
   }
@@ -343,6 +344,7 @@ public class Keyboard2View extends View
     float textSize = scaleTextSize(kv, _config.sublabelTextSize, keyH);
     Paint p = _theme.subLabelPaint(kv.hasFlags(KeyValue.FLAG_KEY_FONT), a);
     p.setColor(labelColor(kv, isKeyDown, true));
+    p.setAlpha(_config.labelBrightness);
     p.setTextSize(textSize);
     float subPadding = _config.keyPadding;
     if (v == Vertical.CENTER)