How can I change the Detail Title section? - xamarin.forms

Question

I have a Xamarin Forms application, and the only plaftorm it supports is UWP. I use Master-Detail architecture. I understand how I can change the Title text of the Detail page, but I need to change e.g. height of the Title pane and its background color. I guess it should be done on the MySolution.UWP project, but don't know how to approach this. I don't even know what I should change, TopCommandBarArea, or CommandBar, or LayoutRoot etc.
Here is some of my code from the shared project:
private void ListView_ItemSelected(object sender, SelectedItemChangedEventArgs e)
{
var item = e.SelectedItem as MainMDPageMenuItem;
if (item == null)
return;
item.ItemBackgroundColor = Color.FromHex("#006c89");
if (PreviouslySelectedItem != null)
{
PreviouslySelectedItem.ItemBackgroundColor = Color.FromHex("#00a8d5");
}
var page = (Page)Activator.CreateInstance(item.TargetType);
page.Title = item.Title;
Detail = new NavigationPage(page);
IsPresented = false;
MasterPage.ListView.SelectedItem = null;
PreviouslySelectedItem = item;
}

Answer 1

To change the Title bar background color, add below snippet in your App.Xaml which is in Xamarin Forms Project:
<Application.Resources>
<ResourceDictionary>
<Style TargetType="NavigationPage">
<Setter Property="BarBackgroundColor"
Value="Maroon"></Setter>
<Setter Property="BarTextColor"
Value="Violet"></Setter>
</Style>
</ResourceDictionary>
</Application.Resources>
And to change the Font Attributes, add below code snippet in your UWP project App.Xaml
<Application.Resources>
<ResourceDictionary>
<Style x:Key="TitleTextBlockStyle"
BasedOn="{StaticResource BaseTextBlockStyle}"
TargetType="TextBlock">
<Setter Property="FontWeight"
Value="SemiLight" />
<Setter Property="FontSize"
Value="36" />
<Setter Property="OpticalMarginAlignment"
Value="TrimSideBearings" />
</Style>
</ResourceDictionary>
</Application.Resources>