CaritasApp/CaritasApp.Android/Resources/values/styles.xml

<?xml version="1.0" encoding="utf-8" ?>
<resources>

  <style name="MainTheme" parent="MainTheme.Base">
    <!-- As of Xamarin.Forms 4.6 the theme has moved into the Forms binary -->
    <!-- If you want to override anything you can do that here. -->
    <!-- Underneath are a couple of entries to get you started. -->

    <!-- Set theme colors from https://aka.ms/material-colors -->
    <!-- colorPrimary is used for the default action bar background -->
    <!--<item name="colorPrimary">#2196F3</item>-->
    <!-- colorPrimaryDark is used for the status bar -->
    <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
    <!-- colorAccent is used as the default value for colorControlActivated
         which is used to tint widgets -->
    <item name="colorAccent">@color/colorAccent</item>
  </style>
</resources>