Pretty wall and room!

Some questions to clarify things a bit — is the bed black? Do you have bedding picked out yet? What colors do you like? Are you wanting (for rug) traditional, transitional, modern, patterns, solid, etc?

The bidding is white color
And the rug what I was thinking’s a modern
The bed is gray color

This site has lots of choices and you can even upload your room on it, to see how a rug would look:

https://www.rugsusa.com/

This is striking (from Horchow). Maybe more traditional than you want, but I do think it works well with modern:

https://www.horchow.com/Sabre-Power-Loomed-Rug-9-x-12-/cprod150340043_cat13760735__/p.prod?icid=&searchType=EndecaDrivenCat&rte=%252Fcategory.service%253FitemId%253Dcat13760735%2526pageSize%253D30%2526No%253D0%2526Ns%253DPCS_SORT%2526refinements%253D4294949398&grpId=cprod150850024&eItemId=cprod150340043&cmCat=product

Nice room! Are you planning to paint anymore?

I’d try a blue or green rug and if you’re into plants you could tie one in to lighten the color palette a bit so it blends more.

also you could add a chair in a coordinating color/print and make it even more cozy

What do you think now