I love putting a fresh spin on something old. For your windows treatments, I would suggest a classic treatment- a cornice board brought up to date with a geometric pattern fabric in soft colors. Then for consistency, use the same pattern and colors elsewhere in the room.
Think of using layers with your window treatments and highlight the window. Possibly adding a roman shade or honeycomb shades to give privacy when you need it. Curtain panels nicely frame the windows. Roman shades in the same ivory linen and then can be lowered when needed, and the cornice will pull everything together.
Draw a line with a Silhouette & Color I love the contrast of black and cream in fabrics and in window treatments..Hunter Douglas makes a beautiful product called Silhouettes.Silhouette window shadings are a shade, but a yet combine the option to open and close unlike most other shades. Silhouette shadings are comprised of a "S-vane" fabric vane suspended between two soft sheer facings. These vanes are available in a variety of textures and colors, from linen-textured vanes to the elegant raw silk textured vanes. There are eight different fabric choices in 2", 3" and 4" vane sizes. The suspended vanes tilt to any angle, giving you full control over the level of privacy and light you desire. In the open position, you have a softened view as if you were looking through a sheer. In the closed position, you have full privacy and can even have the option of a room darkening vane.