diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -56,7 +56,7 @@
         <activity
                 android:name=".ActivityIntro"
                 android:exported="false"
-                android:theme="@style/AppThemeDayNight.NoActionBar"
+                android:theme="@style/AppThemeIntro"
         />
         <activity
                 android:name=".ActivityExperiments"
diff --git a/app/src/main/res/values-night-v27/themes.xml b/app/src/main/res/values-night-v27/themes.xml
new file mode 100644
--- /dev/null
+++ b/app/src/main/res/values-night-v27/themes.xml
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <style name="AppThemeIntro" parent="AppThemeDayNight.NoActionBar">
+        <item name="android:windowLightStatusBar">false</item>
+        <item name="android:windowLightNavigationBar">true</item>
+    </style>
+</resources>
\ No newline at end of file
diff --git a/app/src/main/res/values-night/themes.xml b/app/src/main/res/values-night/themes.xml
--- a/app/src/main/res/values-night/themes.xml
+++ b/app/src/main/res/values-night/themes.xml
@@ -1,11 +1,16 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
+    <!-- REMEMBER TO COPY COLORS in values-v27-night -->
+
     <style name="AppThemeDayNight" parent="Theme.MaterialComponents.DayNight">
         <item name="android:textColorSecondary">@color/text_secondary_night</item>
         <item name="colorPrimary">@color/orange_500_night</item>
         <item name="colorPrimaryDark">@color/orange_700_night</item>
         <item name="colorAccent">@color/teal_500_night</item>
 
+    </style>
 
+    <style name="AppThemeIntro" parent="AppThemeDayNight.NoActionBar">
+        <item name="android:windowLightStatusBar">false</item>
     </style>
 </resources>
\ No newline at end of file
diff --git a/app/src/main/res/values-v19/styles.xml b/app/src/main/res/values-v19/styles.xml
deleted file mode 100644
--- a/app/src/main/res/values-v19/styles.xml
+++ /dev/null
@@ -1,10 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<resources>
-    <style name="AppTheme.NoActionBar" parent="AppTheme">
-
-        <item name="android:windowTranslucentStatus">false</item>
-
-        <item name="windowActionBar">false</item>
-        <item name="windowNoTitle">true</item>
-    </style>
-</resources>
\ No newline at end of file
diff --git a/app/src/main/res/values-v27/styles.xml b/app/src/main/res/values-v27/styles.xml
new file mode 100644
--- /dev/null
+++ b/app/src/main/res/values-v27/styles.xml
@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <style name="AppThemeDayNight" parent="Theme.MaterialComponents.DayNight">
+
+        <item name="colorPrimary">@color/orange_500</item>
+        <item name="colorPrimaryDark">@color/orange_700</item>
+        <item name="colorAccent">@color/teal_500</item>
+        <item name="colorOnPrimary">@color/white</item>
+
+        <item name="android:textColor">@color/black_800</item>
+
+        <item name="android:windowLightNavigationBar">true</item>
+
+    </style>
+    <style name="AppThemeIntro" parent="AppThemeDayNight.NoActionBar">
+        <item name="android:windowLightStatusBar">true</item>
+
+        <item name="android:windowLightNavigationBar">true</item>
+
+    </style>
+</resources>
\ No newline at end of file
diff --git a/app/src/main/res/values-v35/styles.xml b/app/src/main/res/values-v35/styles.xml
deleted file mode 100644
--- a/app/src/main/res/values-v35/styles.xml
+++ /dev/null
@@ -1,4 +0,0 @@
-<resources>
-
-
-</resources>
\ No newline at end of file
diff --git a/app/src/main/res/values/styles.xml b/app/src/main/res/values/styles.xml
--- a/app/src/main/res/values/styles.xml
+++ b/app/src/main/res/values/styles.xml
@@ -79,15 +79,13 @@
         <item name="colorPrimaryDark">@color/orange_700</item>
         <item name="colorAccent">@color/teal_500</item>
         <item name="colorOnPrimary">@color/white</item>
+        <!-- REMEMBER TO COPY THEM in values-v27 -->
         <!-- For the preferences Fragment -->
         <!--<item name="preferenceTheme">@style/PreferenceThemeOverlay</item>-->
 
         <item name="android:textColor">@color/black_800</item>
-        <!-- keep default for day, change for night-->
-        <!--
-        <item name="android:textColorPrimary">@color/grey_700</item>
-        <item name="android:textColorSecondary">@color/text_secondary</item>
-        -->
+        <item name="android:windowLightStatusBar">false</item>
+
     </style>
 
     <style name="AppThemeDayNight.NoActionBar" parent="AppThemeDayNight">
@@ -102,5 +100,10 @@
         <item name="android:fontFamily">@font/lato_regular</item>
     </style>
 
+    <style name="AppThemeIntro" parent="AppThemeDayNight.NoActionBar">
+        <item name="android:windowLightStatusBar">true</item>
+
+    </style>
+
 
 </resources>
\ No newline at end of file