diff --git a/app/src/main/res/drawable/chip_duration_bg.xml b/app/src/main/res/drawable/chip_duration_bg.xml
new file mode 100644
index 0000000..ef1cfb0
--- /dev/null
+++ b/app/src/main/res/drawable/chip_duration_bg.xml
@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:state_checked="true">
+        <shape android:shape="rectangle">
+            <corners android:radius="12dp" />
+            <solid android:color="#81C784" />
+        </shape>
+    </item>
+    <item>
+        <shape android:shape="rectangle">
+            <corners android:radius="12dp" />
+            <solid android:color="#F5F5F5" />
+        </shape>
+    </item>
+</selector>
diff --git a/app/src/main/res/values/themes.xml b/app/src/main/res/values/themes.xml
index a36146a..b277b59 100644
--- a/app/src/main/res/values/themes.xml
+++ b/app/src/main/res/values/themes.xml
@@ -1,12 +1,19 @@
 <resources>
     <style name="Theme.CountdownTimer" parent="Theme.Material3.DayNight.NoActionBar">
         <item name="colorPrimary">@color/md_theme_light_primary</item>
+        <item name="colorPrimaryContainer">@color/md_theme_light_primaryContainer</item>
         <item name="colorSecondary">@color/md_theme_light_secondary</item>
         <item name="android:statusBarColor">@color/color_gradient_start</item>
         <item name="android:windowLightStatusBar">true</item>
+        <item name="chipStyle">@style/ChipDuration</item>
+    </style>
+
+    <style name="ChipDuration" parent="Widget.Material3.Chip.Suggestion.Elevated">
+        <item name="chipBackground">@drawable/chip_duration_bg</item>
     </style>
 
     <color name="md_theme_light_primary">#2E7D32</color>
+    <color name="md_theme_light_primaryContainer">#81C784</color>
     <color name="md_theme_light_secondary">#4C6842</color>
     <color name="md_theme_light_surface">#F1F8E9</color>
 </resources>