title: how to customize the color of frame and title area of HUD panel
body: <p>I need to let the user to customize the HUD window appearance. Is there a way to change the frame and the title area color of HUD window? There is an API for changing a background color of the window, but title and the frame stay semitransparent black. I'd like to avoid drawing these areas by myself.</p>
  
  <p>Thanks,</p>
  
  <p>Nava</p>