i think espresso would tie it all in nicely😺

If it was mine I would say brown.

Brown would blend in better with existing furniture.
But I am not a designer/decorator by any means

Brown would go better with existing colors (especially the khaki)...and it also will go with almost any wall color.

I tried to find color swatches but this is good enough.
I say espresso brown.

Gray. Light gray. Put a throw on the couch or a printed triple woven blanket.

I love espresso/brown but it would weigh the rose gold down too much, imho.

I would pick brown to go with rose gold.

Espresso brown distressed with gray

I would go with eggshell

The most plain color in the world