I wanna make more clearer this answer. First create custom background "storage_list_header_shape.xml" in your drawable folder.
<?xml version="1.0" encoding="utf-8"?>
  <shape xmlns:android="http://schemas.android.com/apk/res/android"
     android:shape="rectangle" >
   <gradient
      android:angle="270"
      android:startColor="@android:color/holo_orange_light"
      android:centerColor="@android:color/holo_orange_dark"
      android:endColor="@android:color/holo_orange_light" />
   <size android:height="3dp" />
 </shape>
Second, create custom style in your style.xml
<style name="customActionModeTheme" parent="@android:style/Theme.Holo.Light">
    <item name="android:actionModeBackground">@drawable/storage_list_header_shape</item>
</style>
Third, call the style in your manifest.
<activity
     android:name="com.javacafe.activities.Main"
     android:launchMode="singleTop"
     android:screenOrientation="sensorLandscape"
     android:theme="@style/customActionModeTheme" >
</activity>