hcp-pad/app/src/main/res/values/themes.xml

<resources>
    <!-- Base application theme. -->
    <style name="Theme.Yingyangfly" parent="Theme.AppCompat.Light.NoActionBar">
        <!-- Primary brand color. -->
        <item name="colorOnPrimary">@color/white</item>
        <!-- Secondary brand color. -->
        <item name="colorOnSecondary">@color/black</item>
    </style>

</resources>