learn-template/template/android/app/src/main/res/values/styles.xml

React Native Base Template

<resources>

    <!-- Base application theme. -->
    <style name="AppTheme" parent="Theme.AppCompat.DayNight.NoActionBar">
        <!-- Customize your theme here. -->
<!--        <item name="android:editTextBackground">@drawable/rn_edit_text_material</item>-->
        <item name="android:textColor">#000000</item>
        <item name="android:windowBackground">#1a2c3a</item>
        <item name="android:windowFullscreen">true</item>
        <item name="colorControlNormal">#1a2c3a</item>
    </style>

</resources>