service/res/values-night/colors.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>
    <!-- Semi-transparent background color of blocking activity. -->
    <color name="activity_blocking_activity_background">#c7000000</color>

    <!-- Color of text in blocking activity. -->
    <color name="blocking_text">#fff5f5f5</color>

    <!-- Background color of button. -->
    <color name="button_background">#ff80cbc4</color>

    <!-- Color of button text. -->
    <color name="button_text">#ff212121</color>

    <!-- Ripple color. -->
    <color name="ripple_background">#3dffffff</color>
</resources>