diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index c73e3ac..4ff4f20 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -11,7 +11,7 @@
         android:icon="@mipmap/ic_launcher"
         android:label="@string/app_name"
         android:supportsRtl="true"
-        android:theme="@style/AppTheme">
+        android:theme="@style/AppTheme.Dark">
         <activity
             android:name=".MainActivity"
             android:label="@string/app_name"
diff --git a/app/src/main/java/com/philliphsu/clock2/alarms/AlarmActivity.java b/app/src/main/java/com/philliphsu/clock2/alarms/AlarmActivity.java
index 4b109ad..d6088cc 100644
--- a/app/src/main/java/com/philliphsu/clock2/alarms/AlarmActivity.java
+++ b/app/src/main/java/com/philliphsu/clock2/alarms/AlarmActivity.java
@@ -91,12 +91,12 @@ public class AlarmActivity extends RingtoneActivity<Alarm> {
 
     @Override
     protected int getLeftButtonDrawable() {
-        return R.drawable.ic_snooze_24dp;
+        return R.drawable.ic_snooze_48dp;
     }
 
     @Override
     protected int getRightButtonDrawable() {
-        return R.drawable.ic_dismiss_alarm_24dp;
+        return R.drawable.ic_dismiss_alarm_48dp;
     }
 
     @Override
diff --git a/app/src/main/java/com/philliphsu/clock2/timers/TimesUpActivity.java b/app/src/main/java/com/philliphsu/clock2/timers/TimesUpActivity.java
index 76ac34c..cd27334 100644
--- a/app/src/main/java/com/philliphsu/clock2/timers/TimesUpActivity.java
+++ b/app/src/main/java/com/philliphsu/clock2/timers/TimesUpActivity.java
@@ -84,13 +84,12 @@ public class TimesUpActivity extends RingtoneActivity<Timer> {
 
     @Override
     protected int getLeftButtonDrawable() {
-        // TODO: correct icon
-        return R.drawable.ic_half_day_1_24dp;
+        return R.drawable.ic_add_48dp;
     }
 
     @Override
     protected int getRightButtonDrawable() {
-        return R.drawable.ic_stop_24dp;
+        return R.drawable.ic_stop_48dp;
     }
 
     @Override
diff --git a/app/src/main/res/drawable/ic_add_48dp.xml b/app/src/main/res/drawable/ic_add_48dp.xml
new file mode 100644
index 0000000..131c6da
--- /dev/null
+++ b/app/src/main/res/drawable/ic_add_48dp.xml
@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="48dp"
+        android:height="48dp"
+        android:viewportWidth="24.0"
+        android:viewportHeight="24.0">
+    <path
+        android:fillColor="#FFFFFF"
+        android:pathData="M19,13h-6v6h-2v-6H5v-2h6V5h2v6h6v2z"/>
+</vector>
diff --git a/app/src/main/res/drawable/ic_dismiss_alarm_48dp.xml b/app/src/main/res/drawable/ic_dismiss_alarm_48dp.xml
new file mode 100644
index 0000000..0054c90
--- /dev/null
+++ b/app/src/main/res/drawable/ic_dismiss_alarm_48dp.xml
@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="48dp"
+        android:height="48dp"
+        android:viewportWidth="24.0"
+        android:viewportHeight="24.0">
+    <path
+        android:fillColor="#FFFFFF"
+        android:pathData="M12,6c3.87,0 7,3.13 7,7 0,0.84 -0.16,1.65 -0.43,2.4l1.52,1.52c0.58,-1.19 0.91,-2.51 0.91,-3.92 0,-4.97 -4.03,-9 -9,-9 -1.41,0 -2.73,0.33 -3.92,0.91L9.6,6.43C10.35,6.16 11.16,6 12,6zM22,5.72l-4.6,-3.86 -1.29,1.53 4.6,3.86L22,5.72zM2.92,2.29L1.65,3.57 2.98,4.9l-1.11,0.93 1.42,1.42 1.11,-0.94 0.8,0.8C3.83,8.69 3,10.75 3,13c0,4.97 4.02,9 9,9 2.25,0 4.31,-0.83 5.89,-2.2l2.2,2.2 1.27,-1.27L3.89,3.27l-0.97,-0.98zM16.47,18.39C15.26,19.39 13.7,20 12,20c-3.87,0 -7,-3.13 -7,-7 0,-1.7 0.61,-3.26 1.61,-4.47l9.86,9.86zM8.02,3.28L6.6,1.86l-0.86,0.71 1.42,1.42 0.86,-0.71z"/>
+</vector>
diff --git a/app/src/main/res/drawable/ic_snooze_48dp.xml b/app/src/main/res/drawable/ic_snooze_48dp.xml
new file mode 100644
index 0000000..8937bda
--- /dev/null
+++ b/app/src/main/res/drawable/ic_snooze_48dp.xml
@@ -0,0 +1,8 @@
+<!-- drawable/sleep.xml -->
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:height="48dp"
+    android:width="48dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path android:fillColor="#FFFFFF" android:pathData="M23,12H17V10L20.39,6H17V4H23V6L19.62,10H23V12M15,16H9V14L12.39,10H9V8H15V10L11.62,14H15V16M7,20H1V18L4.39,14H1V12H7V14L3.62,18H7V20Z" />
+</vector>
\ No newline at end of file
diff --git a/app/src/main/res/drawable/ic_stop_48dp.xml b/app/src/main/res/drawable/ic_stop_48dp.xml
new file mode 100644
index 0000000..3cf8265
--- /dev/null
+++ b/app/src/main/res/drawable/ic_stop_48dp.xml
@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="48dp"
+        android:height="48dp"
+        android:viewportWidth="24.0"
+        android:viewportHeight="24.0">
+    <path
+        android:fillColor="#FFFFFF"
+        android:pathData="M6,6h12v12H6z"/>
+</vector>
diff --git a/app/src/main/res/layout/activity_ringtone.xml b/app/src/main/res/layout/activity_ringtone.xml
index 41f518b..8f86ce3 100644
--- a/app/src/main/res/layout/activity_ringtone.xml
+++ b/app/src/main/res/layout/activity_ringtone.xml
@@ -71,6 +71,7 @@
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
                 android:layout_gravity="center"
+                android:gravity="center"
                 android:drawablePadding="8dp"
                 style="@style/TextAppearance.AppCompat.Medium"/>
 
@@ -88,6 +89,7 @@
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
                 android:layout_gravity="center"
+                android:gravity="center"
                 android:drawablePadding="8dp"
                 style="@style/TextAppearance.AppCompat.Medium"/>