diff --git a/LimeStudio/app/build.gradle b/LimeStudio/app/build.gradle
index b448a24..2f061aa 100644
--- a/LimeStudio/app/build.gradle
+++ b/LimeStudio/app/build.gradle
@@ -34,8 +34,8 @@ android {
 
         minSdkVersion 23
         targetSdkVersion 30
-        versionCode 631
-        versionName '6.3.1'
+        versionCode 640
+        versionName '6.4.0'
     }
     buildTypes {
         release {
diff --git a/LimeStudio/app/src/main/res/drawable/btn_flat_keyboard_normal_key_normal_light.xml b/LimeStudio/app/src/main/res/drawable/btn_flat_keyboard_normal_key_normal_light.xml
index ea2d79d..5c1ba91 100644
--- a/LimeStudio/app/src/main/res/drawable/btn_flat_keyboard_normal_key_normal_light.xml
+++ b/LimeStudio/app/src/main/res/drawable/btn_flat_keyboard_normal_key_normal_light.xml
@@ -43,8 +43,7 @@
         />
 
     <stroke
-        android:width="2dp"
-        android:color="@color/keyboard_background_light"
+        android:width="1px"
+        android:color="@color/color_black"
         />
-
 </shape>
\ No newline at end of file
diff --git a/LimeStudio/app/src/main/res/drawable/btn_keyboard_key_light.xml b/LimeStudio/app/src/main/res/drawable/btn_keyboard_key_light.xml
index ac8f6fa..2066f7a 100644
--- a/LimeStudio/app/src/main/res/drawable/btn_keyboard_key_light.xml
+++ b/LimeStudio/app/src/main/res/drawable/btn_keyboard_key_light.xml
@@ -29,9 +29,9 @@
 	<!-- Functional keys. -->
 
     <item android:state_single="true" android:state_pressed="true"
-          android:drawable="@drawable/btn_flat_keyboard_function_key_pressed_light" />
+          android:drawable="@drawable/btn_flat_keyboard_normal_key_pressed_light" />
     <item android:state_single="true"
-          android:drawable="@drawable/btn_flat_keyboard_function_key_normal_light"/>
+          android:drawable="@drawable/btn_flat_keyboard_normal_key_normal_light"/>
 
 
     <!-- Normal keys -->
diff --git a/LimeStudio/app/src/main/res/values/colors.xml b/LimeStudio/app/src/main/res/values/colors.xml
index 0b86a90..c66781a 100644
--- a/LimeStudio/app/src/main/res/values/colors.xml
+++ b/LimeStudio/app/src/main/res/values/colors.xml
@@ -35,7 +35,7 @@
 
     <!-- colors for light theme -->
 
-    <color name="keyboard_background_light">#FFC8C8C8</color>
+    <color name="keyboard_background_light">#FFFFFF</color>
     <color name="second_background_light">#FFE1E1E1</color>
     <color name="second_background_light_fl">#FFFBFBFB</color>
     <color name="third_background_light">#FFFAFAFA</color>