res/values/styles.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- Copyright (C) 2015 The Android Open Source Project

     Licensed under the Apache License, Version 2.0 (the "License");
     you may not use this file except in compliance with the License.
     You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

     Unless required by applicable law or agreed to in writing, software
     distributed under the License is distributed on an "AS IS" BASIS,
     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     See the License for the specific language governing permissions and
     limitations under the License.
-->
<resources xmlns:android="http://schemas.android.com/apk/res/android"
    >

    <style name="AppTheme" parent="android:Theme.Material.Light.NoActionBar">
        <item name="android:colorControlHighlight">@color/car_card_ripple_background_light</item>
        <item name="android:windowBackground">@null</item>
    </style>

    <!-- Gearhead app themes -->
    <!-- Primary colors will be used as the list overscroll glow at 0x33 opacity. This is the only
         way to set the overscroll glow color. -->
    <style name="ProjectedTheme" parent="android:Theme.Material.Light.NoActionBar">
        <item name="android:colorPrimary">@color/car_overscroll_glow</item>
        <item name="android:windowBackground">@null</item>
    </style>

    <style name="TelecomTheme" parent="android:Theme.Material.Light.NoActionBar">
        <item name="android:colorPrimary">@color/phone_theme</item>
        <item name="android:colorPrimaryDark">@color/phone_theme_dark</item>
        <item name="android:windowBackground">@null</item>
    </style>

    <!-- Phone -->
    <style name="DialpadKeyButtonStyle">
        <item name="android:clickable">true</item>
        <item name="android:layout_width">@dimen/stream_button_size</item>
        <item name="android:layout_height">@dimen/stream_button_size</item>
        <item name="android:background">@drawable/dialpad_button_background</item>
        <item name="android:focusable">true</item>
    </style>

    <style name="DialpadCall">
        <item name="android:layout_width">@dimen/dial_number_call_button_width</item>
        <item name="android:layout_height">@dimen/dial_number_call_button_width</item>
    </style>

    <style name="InCallDialpad">
        <item name="android:focusable">true</item>
        <item name="android:background">@drawable/rotary_in_call_dialpad_button_background</item>
        <item name="android:gravity">center</item>
        <item name="android:fontFamily">sans-serif-condensed</item>
        <item name="android:textStyle">normal</item>
        <item name="android:textSize">@dimen/keyboard_key_letter_height</item>
        <item name="android:textColor">@color/car_headline1</item>
    </style>
</resources>