Tree backgroundcolor

Hi

I use the htmlb control tree in my iview in a few different jsp files. I would like to configure the tree to display different background colours depending on which jsp file that is currently displayed.

In the theme editor I can only use one bgcolor. And I can't create two themes and make use of it; the role and the user are the same in both jsp files.

Is it possible to set the backgroundcolor when I'm creating the tree? Or is there another way?

Brgds// -Fred