Make Illustrator, Photoshop and InDesign tool bar borders/headers colours different between apps

I often have three apps open on my desktop while I work in InDesign, Illustrator and Photoshop and their toolbars all look pretty much the same when I’m popping back and forth. If they were different colours it would be very helpful. Right now I constantly end up losing the InDesign screen to an Photoshop or Illustrator image. It’s obviously not fatal, but it’s annoying as hell.

(Why don’t you have a suggestion category for InDesign anyway?)