Change the colour of the status bar on Android (in Xamarin Forms)

In your Android project, values folder styles.xml file you’ll find something like

<style name="MainTheme" parent="MainTheme.Base">
   <!-- -->
</style>

and/or

<style name="MainTheme.Base" parent="Theme.AppCompat.Light.DarkActionBar">
   <!-- -->
</style>

Use the following element and attribute in the MainTheme.Base if that exists or the MainTheme (it will depend on the template you used at to whether one or both of these exist)

<!-- Top status bar area on Android -->
<item name="android:statusBarColor">#FF0C1436</item>

You may wish to also change the colour of the bar background at the top of the NavigationPage (if you’re using the NavigationPage such as with Prism) by adding the following to the App.xaml

<Application.Resources>
  <ResourceDictionary>
    <Style TargetType="NavigationPage">
      <Setter Property="BarBackgroundColor" Value="Color.Red"/>
      <Setter Property="BarTextColor" Value="Color.White"/>
    </Style>
  </ResourceDictionary>
</Application.Resources>

in non-Prism you can change the Primary colour, for example again in App.xaml

<Application.Resources>
  <ResourceDictionary>
    <Color x:Key="Primary">#FF3399FF</Color>
  </ResourceDictionary>
</Application.Resources>