Pick your paint colors last, since there is more variety in paint color and you can have paint mixed to match other purchases. The inspiration bedroom features what appears to be a toile print bedspread. Here’s a link to some similar bedspreads:

https://www.houzz.com/photos/products/query/Toile-bedspread/nqrwns

A possibility?

https://www.birchlane.com/rugs-windows/pdp/althoff-naturefloral-printed-cotton-twill-rod-pocket-single-curtain-panel-trpt4910.html?piid=26602152

Birch Lane seems to be a good source for this kind of fabric.

https://www.birchlane.com/rugs-windows/pdp/panagia-naturefloral-room-darkening-thermal-rod-pocket-curtain-panels-bayi7542.html?piid=21204921

https://www.birchlane.com/rugs-windows/pdp/birch-lane-chapin-naturefloral-room-darkening-curtain-panel-pair-bl13012.html?piid=21891305

Blue and brown are actually not a natural combination, and while it had a moment a decade ago, you will find little of it now. Less in a floral. I would not have begun with brown roman shades and boxed myself into a corner.

Go to your local bedding stores, and begin with the bedding. Then you can select a complementary paint. First...........before all ? A good mattress.

Just wondering why are you picking paint and bedding out before you have the furniture figured out?

Ethan Allen has that bedding you are inquiring about. If you are looking for yards of fabric, I'm sure they could help you with that, too.

Loxley Floral Duvet Cover and Shams | DUVET COVERS | Ethan Allen · More Info

Pick paint last.

According to the picture info,that second set of bedding is Pottery Barn. Maybe they still sell it or something similar? Once you have the bedding,then choose paint.