styles.xml

<resources>

    <style name="AppTheme" parent="AppBaseTheme">
        <!-- Extends the base theme below -->
    </style>

    <style name="AppBaseTheme" parent="Theme.AppCompat.Light.DarkActionBar">
        <item name="android:actionBarStyle">@style/MyActionBar</item>
        <item name="android:actionBarTabTextStyle">@style/MyActionBarTabText</item>

        <!-- Support library compatibility -->
        <item name="actionBarStyle">@style/MyActionBar</item>
        <item name="actionBarTabTextStyle">@style/MyActionBarTabText</item>
    </style>

    <style name="MyActionBar" parent="@style/Widget.AppCompat.Light.ActionBar.Solid.Inverse">
        <item name="android:background">@color/simple_yellow</item>
        <item name="android:titleTextStyle">@style/MyActionBar.TitleTextStyle</item>

        <!-- Support library compatibility -->
        <item name="background">@color/simple_yellow</item>
        <item name="titleTextStyle">@style/MyActionBar.TitleTextStyle</item>
    </style>

    <style name="MyActionBar.TitleTextStyle"
        parent="@style/TextAppearance.AppCompat.Widget.ActionBar.Title">
        <item name="android:textColor">@color/primary_blue</item>
    </style>

    <style name="MyActionBarTabText" parent="@style/Widget.AppCompat.ActionBar.TabText">
        <item name="android:textColor">@color/primary_blue</item>
    </style>

</resources>