Change Main page grid's background color from settings page instantly .NET MAUI

new to MAUI, i have a MainPage and i have a Settings page, lets say i want to change the background color of a grid inside MainPage. xaml from Settings page and have its affect applied instantly. how can i do it?

i already know how to apply it on app restart by assigning the grid a name and then assign the new color to grid's background on MainPage's constructor using preferences . but how can i apply it without having to restart the app?

I've tried accessing it directly from settings page but that didn't work.

You can use DynamicResource for this, You can define the Color and Then change it from SettingsPage and it will be updated, You can define your colors in your App.Xaml

<Color x:Key="PrimaryColor">#2196F3</Color>
<Color x:Key="SecondaryColor">#FFC107</Color>

And then update it on runtime

Application.Current.Resources["PrimaryColor"] = Color.Red;

This Color should be used in your Controls with the DynamicResource keyword

BackgroundColor="{DynamicResource PrimaryColor}"

Hope this helps!

In your .xaml.cs of Settings page:

Navigation.PushAsync(new MainPage(Colors.BlueViolet));

MainPage.xaml.cs:

public MainPage (Color backgroundColor)
{
   InitializeComponent ();
   grid.BackgroundColor = backgroundColor;
}