Conversations/res/values/themes.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>

    <style name="ConversationsTheme" parent="@android:style/Theme.Holo.Light.DarkActionBar">
        <item name="android:actionBarStyle">@style/ConversationsActionBar</item>
        <item name="android:actionBarWidgetTheme">@style/ConversationsActionBarWidget</item>
        <item name="android:actionBarTabStyle">@style/ConversationsActionBarTabs</item>
        <item name="TextSizeInfo">12sp</item>
        <item name="TextSizeBody">14sp</item>
        <item name="TextSizeHeadline">20sp</item>
    </style>

    <style name="ConversationsTheme.LargerText" parent="ConversationsTheme">
        <item name="TextSizeInfo">14sp</item>
        <item name="TextSizeBody">16sp</item>
        <item name="TextSizeHeadline">22sp</item>
    </style>

    <style name="ConversationsActionBar" parent="@android:style/Widget.Holo.Light.ActionBar.Solid.Inverse">
        <item name="android:background">@color/primary</item>
        <item name="android:backgroundStacked">@color/primarydark</item>
        <item name="android:displayOptions">showHome|homeAsUp|showTitle</item>
        <item name="android:icon">@android:color/transparent</item>
    </style>

    <style name="ConversationsActionBarWidget" parent="android:Theme.Holo.Light">
        <item name="android:popupMenuStyle">@android:style/Widget.Holo.Light.PopupMenu</item>
        <item name="android:dropDownListViewStyle">@android:style/Widget.Holo.Light.ListView.DropDown</item>
    </style>

    <style name="ConversationsActionBarTabs" parent="@android:style/Widget.Holo.ActionBar.TabView">
        <item name="android:background">@drawable/actionbar_tab_indicator</item>
    </style>

</resources>