Visually distinguish Keywords and References?

Another small interface whinge. I find myself dragging refs/urls into the keywords panel more often than not. A bit retarded, what?
Would it be possible to make the visual difference between the references and keywords panes a little more pronounced? Perhaps there’s no real need to use alternating blue/white lines in both.

E

If you nixed the guides in one view, I’d suggest keywords. There is only one column per row, so the need for a visual row guide is – nonexistent.