I have a similar rug in my office, and chose a kazak for the hall

3'5"x4'10" Hand-Knotted Kazak Pure Wool Geometric Design Oriental Rug R31262 · More Info

I would select a muted vintage or very muted oriental style rug with blues/off whites, etc.

Inspiration photo as an example.

Perhaps a round would look nice... could cover the foyer area. Here is an oval.

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