//You need a TWebbrowser and 3 TButtons 

// First load a page 
procedure TForm1.Button1Click(Sender: TObject); 
begin 
  WebBrowser1.Navigate('www.SwissDelphiCenter.com'); 
end; 

// Show the background color 
// Hintergrundfarbe herausfinden 
procedure TForm1.Button2Click(Sender: TObject); 
begin 
  ShowMessage(WebBrowser1.OleObject.Document.bgColor); 
end; 

// Set the background color 
procedure TForm1.Button3Click(Sender: TObject); 
begin 
  WebBrowser1.OleObject.Document.bgColor := '#000000'; 
end;