Of course there is. In the 1001-definition, find WordWheel and add a background parameter for the background element, which would be this one in 8.5:
code:
<Element LayoutPos=Top Layout=BorderLayout() BorderThickness=rect(0,0,0,1) Padding=Rect(0,0,2,0) ID=Atom(ai550)>
You could also change the stylesheet for 1001, if you want to do that instead, just make a search on
ai550.
Edit: I know I'm not explaining very well, the reason is I want you to learn yourself, I will just give you hints.