<resources>
    <style name="MyCustomTheme" parent="Theme.AppCompat.Light">
        <item name="android:statusBarColor">@color/color_primary</item>
        <item name="android:actionBarStyle">@style/MyActionBar</item>
    </style>

    <style name="MyActionBar" parent="@android:style/Widget.Holo.Light.ActionBar">
        <item name="android:background">@color/color_primary</item>
    </style>
</resources>

<activity
       android:name=".MyActivity"
       android:theme="@style/MyCustomTheme"/>