I need to see the whole room

When you select colors for your home each room should somehow connect to the other rooms. There are many colors that work beautifully with the grays and blues in the duvet cover - much like matching a shirt to go with blue jeans. If there were no other rooms to consider I might go with navy for the walls and white trim, but that may look really odd if the rest of your home is all light colors.

Yes a light blue, blue gray will work, so would l light greener gray and may add more interest.

There are a few blues that look good with the comforter.

In the Midnight Hour is a bold choice.

For grays, BM Balboa Mist is a nice choice.

I painted my bedroom SW hinting blue. Love it!

Navy on an accent wall that cannot be seen from other rooms, remaining walls a white in the same tone as your duvet white. This wil make your bedding pop and not blend andisappear with your suggested colors.

The only wall tgat can’t be seen from the door is the wall behind the headboard. So that walk a darker blue? I just looked up the SW hinting blue - such a pretty color!