styles.xml

<resources>

    <!-- Base application theme. -->
    <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
        <!-- Customize your theme here. -->
        <item name="colorPrimary">@color/colorPrimary</item>
        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
        <item name="colorAccent">@color/colorAccent</item>
        <item name="android:background">@color/colorBlancoTransparente</item>
    </style>
    <style name="CustomButton" parent="Widget.MaterialComponents.Button">
        <item name="android:padding">12dp</item>
        <item name="cornerRadius">12dp</item>
    </style>


</resources>