I would do light blue sheers on a simple, dark rod. <3 Mount 'em high and wide (which probably means you'll be covering the entire wall when the curtains are opened).

I think your instinct is right. I would do simple white floor to ceiling panels on the windows. I would get a rod to match the color of your barn door hardware. I would hang the drapery panels on rings for a more professional look. Mount it as high as you can. A linen white French linen would hang and look beautiful. If you crave color I would do a beautiful trim on the inside lead of each panel in a soft blue gray color. Depending on your measurement you may be able to buy ready made. If you chose to add a flat trim a seamstress could add that to a ready made or if you go custom on the whole treatment of course they can.

I would do a rod the whole way across. What is the measurement from floor to top of wall? Measurement of width of window? Measurement from window to corner on each side of window? Where are you located? With this info I can help guide you.

Ready pre mades will come in 96" .then jump up to 108'. If you add a rod depending on the rods circumference size will roughly add 2" to the length. so 98" or 110". This means 108" will have a large break on the floor and 96" will mean the rod will need to be mounted a bit lower. As far as width you have enough on each side of the window to mount the rod easily a minimum of 6" outside the casing on each side but I recommend more so that the inside lead of your panels are just covering the casing to allow more light when your shades are open. For fullness you could go with a double width for ready made or a width and a half for custom to give you a nice lush fullness while still sitting off the window. I think it would look nicer to go as high as possible which means if you purchase ready made getting them hemmed. I don't know anyone in your area that does custom. Of course in the end it also depends on what your overall Budget is. Half Priced Drapes is ready made but you can order a custom size from them and overall their quality is good. You can get samples of the fabrics from them too. If you have a decorator fabric store like a Calico Corners Or Printers Alley they will have sources to have drapes custom made and guide you.

Thinking maybe you should get rid of those roman shades and put in something with more texture, like woven wood shades with blackout lining. Then add drapery panels on either side. Not sure how much clearance you have between the window wall in the bed, but if there's room for a narrow bench to go under the window, I might add that, too. The goal is to soften the look. The shades you have now are a bit too hard-edged looking, IMO.

Here are a couple of inspiration photos:

Woven Wood Shades · More Info

Transitional Master Bedroom · More Info

Ah, sorry, didn't read through the entire thread of comments. Glad it worked out for you.

You're welcome Abby. Glad you were able to resolve your dilemma and I could be of assistance. Best of luck with your room and windows. Hope you can share the completed project when the time comes .

Abby are you getting sheers or a solid panel for each side? My recommendation was for solid panels (not sheers) for each side. Just curious.

DRAPERY DRAPERY DRAPERY!

I agree with the others, add some drapery. Go WIDE as well. Take up that entire wall.

The art of layering · More Info

And add some COLOR to those pillows! Go neutral with the drapery, and sassy with your pillows.

You will transform your room with minimal cost that will have a HUGE impact!

The Importance of Fabric · More Info