samples/SupportLeanbackShowcase/app/src/main/res/values/styles.xml

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

    <style name="AppTheme" parent="@style/Theme.Leanback">
    </style>

    <style name="StandardCardPrimaryText">
        <item name="android:ellipsize">end</item>
        <item name="android:layout_width">wrap_content</item>
        <item name="android:layout_height">wrap_content</item>
        <item name="android:textSize">14sp</item>
        <item name="android:textColor">@color/card_primary_text</item>
        <item name="android:lineSpacingMultiplier">1.09</item>
    </style>

    <style name="StandardCardSecondaryText">
        <item name="android:ellipsize">end</item>
        <item name="android:layout_width">wrap_content</item>
        <item name="android:layout_height">wrap_content</item>
        <item name="android:textSize">12sp</item>
        <item name="android:textColor">@color/card_secondary_text</item>
        <item name="android:lineSpacingMultiplier">1.13</item>
    </style>
    <style name="ImageCardViewColoredTextStyle" parent="Widget.Leanback.ImageCardViewStyle">
        <item name="titleStyle">@style/ImageCardViewColoredTitle</item>
        <item name="infoAreaBackground">#F00</item>
    </style>

    <style name="WizardActionsContainerStyle" parent="Widget.Leanback.GuidedActionsContainerStyle">
        <item name="android:background">#C03800</item>
    </style>

    <style name="DialogActionsContainerStyle" parent="Widget.Leanback.GuidedActionsContainerStyle">
        <item name="android:background">#263238</item>
    </style>

    <style name="ImageCardViewColoredTitle" parent="Widget.Leanback.ImageCardView.TitleStyle">
        <item name="android:textColor">#F0F</item>
    </style>

</resources>