I need some interior decorating thoughts

With charcoal, I would look toward the parchment tone, something to lighten the rest of the room. What color are your cabinets and appliances? That can determine where you need to be between off white and beige, somewhere between cream and parchment is my recommendation.

It would probably go with cream/dirty white..normally it should be light abd dark combination. You already have charcoal gray as the darker side you need something light to complement it

I'd have to see the room.