Hang rod close to the ceiling even on french doors. Gray curtains over French doors.but possibly with a navy wall. Beige wall would also work.
This DIY window cornice gives windows a MAJOR new look! Full detailed step-by-step photo tutorial on Remodelaholic.
DIY How to Build a Window Cornice.
diy wall hanging with panels | Make Room-Darkening Sliding Window Panels : How-To : DIY Network