react-native-shared-defaults/android/src/main/res/values/colors.xml

Implement read/write SharedPreferences (Android) & UserDefault (iOS)

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <color name="colorPrimary">#3F51B5</color>
    <color name="colorPrimaryDark">#303F9F</color>
    <color name="colorAccent">#FF4081</color>
</resources>