packages/CarSystemUI/res/values/colors_car.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
/*
 * Copyright 2018, 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>
    <color name="car_qs_background_primary">#263238</color> <!-- Blue Gray 900 -->
    <color name="car_qs_footer_user_name_color">@*android:color/car_grey_50</color>

    <!-- colors for user switcher -->
    <color name="car_user_switcher_background_color">@*android:color/car_card_dark</color>
    <color name="car_user_switcher_name_text_color">@*android:color/car_body1_light</color>
    <color name="car_user_switcher_add_user_background_color">@*android:color/car_dark_blue_grey_600</color>
    <color name="car_user_switcher_add_user_add_sign_color">@*android:color/car_body1_light</color>

</resources>