Go into the UIFILES and change these:
Red is foreground="WINDOW"
Green is <element foreground="themeable(gtc(Communications::Rebar, 0, 0, 3806),gradientinactivecaption)" />
Change WINDOW and Communications::Rebar, 0, 0, 3806 (Toolbars, Headers and Rebar > Rebar > Communications > EDGESHADOWCOLOR:COLOR in WSB) to the colors you want.