Change the focused border color of a Wpf textbox when it GotFocus()

Question

What I want: to change the border color to yellow when any textbox has focus.

What I tried:

You can find the original style template in the WPF source code: https://github.com/dotnet/wpf/blob/c271205b80c27df976acbd7236ec637090d127c1/src/Microsoft.DotNet.Wpf/src/Themes/XAML/TextBox.xaml#L415-L441