Android Question Change background in PreferencesDialog

[Blueforcer]

How to change the color of red marked area in the B4XPreferencesDialog?

GameDialog.Initialize(Root,"Spiel erstellen",100%x,90%y)
GameDialog.LoadFromJson(File.ReadString(File.DirAssets, "gameconfig.json"))
GameDialog.ItemsBackgroundColor=xui.Color_Black
GameDialog. Dialog.BackgroundColor = xui.Color_Black
GameDialog. Dialog.ButtonsColor = xui.Color_Black
Dim sf As Object=GameDialog.ShowDialog(GameOptions, "OK", "CANCEL")
GameDialog.Dialog.Base.Parent.As(Panel).Elevation = 100dip
Wait For (sf) Complete (Result As Int)

thanks in advice