diff --git a/app/src/main/java/sushi/hardcore/droidfs/adapters/OpenAsDialogAdapter.kt b/app/src/main/java/sushi/hardcore/droidfs/adapters/OpenAsDialogAdapter.kt
index c7f4161..ba6f24d 100644
--- a/app/src/main/java/sushi/hardcore/droidfs/adapters/OpenAsDialogAdapter.kt
+++ b/app/src/main/java/sushi/hardcore/droidfs/adapters/OpenAsDialogAdapter.kt
@@ -8,6 +8,7 @@ class OpenAsDialogAdapter(context: Context, showOpenWithExternalApp: Boolean) :
         listOf("image", R.string.image, R.drawable.icon_file_image),
         listOf("video", R.string.video, R.drawable.icon_file_video),
         listOf("audio", R.string.audio, R.drawable.icon_file_audio),
+        listOf("pdf", R.string.pdf_document, R.drawable.icon_file_pdf),
         listOf("text", R.string.text, R.drawable.icon_file_text)
     )
     init {
diff --git a/app/src/main/res/values/colors.xml b/app/src/main/res/values/colors.xml
index 5b8e4cf..ea0073c 100644
--- a/app/src/main/res/values/colors.xml
+++ b/app/src/main/res/values/colors.xml
@@ -16,4 +16,5 @@
     <color name="itemSelected">#66666666</color>
     <color name="playerDoubleTapTouch">#18FFFFFF</color>
     <color name="playerDoubleTapBackground">#20EEEEEE</color>
+    <color name="dialogDarkBackground">#333333</color>
 </resources>
\ No newline at end of file
diff --git a/app/src/main/res/values/dialog_styles.xml b/app/src/main/res/values/dialog_styles.xml
index ea0981c..876cecd 100644
--- a/app/src/main/res/values/dialog_styles.xml
+++ b/app/src/main/res/values/dialog_styles.xml
@@ -3,7 +3,7 @@
 
     <style name="DarkGreenDialog" parent="Theme.AppCompat.Dialog.Alert">
         <item name="colorAccent">@color/secondary</item>
-        <item name="android:background">#333333</item>
+        <item name="android:background">@color/dialogDarkBackground</item>
     </style>
     <style name="DarkRedDialog" parent="DarkGreenDialog">
         <item name="colorAccent">@color/red</item>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 24c638c..fa30e40 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -226,4 +226,5 @@
     <string name="copy_external_volume">Make a hidden copy</string>
     <string name="copy_volume_notification">Copying volume…</string>
     <string name="hidden_volume_already_exists">A hidden volume with the same name already exists.</string>
+    <string name="pdf_document">PDF document</string>
 </resources>
diff --git a/app/src/main/res/values/styles.xml b/app/src/main/res/values/styles.xml
index 66cf311..abbd0f0 100644
--- a/app/src/main/res/values/styles.xml
+++ b/app/src/main/res/values/styles.xml
@@ -3,6 +3,7 @@
         <item name="android:textColor">@color/textColor</item>
         <item name="colorAccent">@color/secondary</item>
         <item name="colorPrimary">@color/primary</item>
+        <item name="colorSurface">@color/dialogDarkBackground</item>
         <item name="android:statusBarColor">@color/primary</item>
         <item name="infoBarBackgroundColor">#111111</item>
         <item name="buttonBackgroundColor">#5B5A5C</item>