Based on the picture of the drapes I would say blue bedding and a gray rug. If it weren't for the kids and dog I would say white bedding. The rug should be either darker or lighter than the wall color. If they're the same it will make the room look monotone - unless that's what you want, but based on the drapes you chose, I doubt it. :-)

What a great-looking room! I really like your style. The painting and those chairs are wonderful! Your chandelier looks great, too. A rug would give a nicely layered and finished look. Rug from CB2: https://www.cb2.com/marlowe-handknotted-black-and-red-area-rug-8x10/s590308 I think it would look lighter in person. I’m going to add more, give me a minute. My iPad is acting the fool today and I keep losing my posts. ETA: Trying again! I like this a lot: https://www.cb2.com/raumont-hand-knotted-brown-detailed-area-rug-9x12/s120664 I’ll stop there because I think you’re going to get talked out of using a rug. :)

I have also been considering this but was thinking legs could anchor the room more since everything else is lifted. https://www.westelm.com/products/mid-century-storage-coffee-table-acorn-h4542/?catalogId=71&sku=5051782&cm_ven=PLA&cm_cat=Google&cm_pla=Furniture > Coffee Tables&region_id=820120&cm_ite=5051782_14465514686&gad_source=1&gclid=CjwKCAiAgeeqBhBAEiwAoDDhn56shYplAjZyL-2tuAR3zO0riLM-WKoj4bZM3ia--l56qTalnx8WMRoCI3MQAvD_BwE

That rug would not work, the patterns are too similar. You want a small, tight pattern on the floor. Can you do more pics, and maybe do a quick floorplan of the entry area?