B4J Question (Solved) WebView background color. Can I change it?

Sub AppStart (Form1 As Form, Args() As String)
    MainForm = Form1
    MainForm.RootPane.LoadLayout("1") 'Load the layout file.
    MainForm.Show
    WebView1.LoadUrl("https://www.google.com")
    Wait For WebView1_PageFinished (Url As String)
    ExecuteJavaScript(WebView1, $"document.body.style.backgroundColor = '#F00'"$)
End Sub

Sub ExecuteJavaScript (wv As WebView, script As String) As Object
    Dim jo As JavaObject = wv
    Return jo.RunMethodJO("getEngine", Null).RunMethod("executeScript", Array(script))
End Sub