<resources>

<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
    <!-- Customize your theme here. -->

</style>

</resources>

<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
    <item name="colorPrimary">#995544</item>
</style>

<item name="colorPrimary">@color/yourColor</item>

<style name="AppCompatTheme" parent="Theme.AppCompat.Light.DarkActionBar">
    <item name="android:background">#ff540e9e</item>
    <item name="android:textColor">#ffffff</item>
</style>

//First you need to declare the custom theme in your styles file
</style>

   <style name="MyCustomTheme" parent="@android:style/Theme.AppCompat.Light.DarkActionBar">
    <item name="android:actionBarStyle">@style/MyActionBarTheme</item>

  </style>
//Then you provide details on it layout/color etc
  <style name="MyActionBarTheme" parent="@android:style/Widget.AppCompat.Light.DarkActionBar">
       <item name="android:background">#33FF33</item>
      </style>