Staring with Ubuntu 13.04, the outline around windows when scale/spread (Super+W) and the switcher (when viewing different windows of an application using Alt+`) are invoked is red. See the pictures below. The outline stays red even when I change themes. Using the CompizConfig Settings Manager I can change the color of the outlines that appear when expo is invoked, windows are set into a grid, and windows are resized, but I can't find an option for scale/spread or the switcher.
How can I change the outline's color?