chromium/components/browser_ui/widget/android/java/res/color/chip_stroke_color.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
Copyright 2018 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">
    <!-- disabled -->
    <item android:alpha="@dimen/chip_outline_disabled_alpha" android:color="@macro/chip_outline_color"
        android:state_enabled="false"/>

    <!-- unselected & focused -->
    <item android:alpha="@dimen/chip_outline_focused_alpha" android:color="@macro/chip_outline_focused_color"
        android:state_selected="false"
        android:state_focused="true"/>

    <!-- unselected -->
    <item android:alpha="@dimen/chip_outline_alpha" android:color="@macro/chip_outline_color"
        android:state_selected="false"/>

    <item android:color="@android:color/transparent" />
</selector>