chromium/chrome/android/webapk/shell_apk/res/values/colors.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
Copyright 2017 The Chromium Authors
Use of this source code is governed by a BSD-style license that can be
found in the LICENSE file.
-->

<resources>
    <!-- Common colors-->
    <color name="webapk_black_alpha_38">#61000000</color>
    <color name="webapk_black_alpha_54">#8A000000</color>
    <color name="webapk_black_alpha_87">#DE000000</color>
    <color name="white_adaptive_ic_launcher_background">#FFFFFF</color>
</resources>