chromium/chrome/android/features/tab_ui/public/android/java/res/color/bg_tabstrip_tab_folio_startup_tint.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
Copyright 2023 The Chromium Authors
Use of this source code is governed by a BSD-style license that can be
found in the LICENSE file.
-->

<selector xmlns:android="http://schemas.android.com/apk/res/android">
  <item android:alpha="@dimen/bg_tabstrip_tab_folio_startup_alpha"
      android:color="?attr/colorPrimary"/>
</selector>