Help me pick paint

[Nyborg]

I'm redecorating a big sitting/dining room in a 1950s house - like this one: www.wowhaus.co.uk/wp-content/uploads/wey1.jpg.

The room's already bright but it has huge windows and so seems a bit muted on grey days. We've added lamps but I'd like to improve on the current magnolia walls. I need to keep it neutral because it's such a big space and because we have artwork all over the room that I want to be the focus.

Any ideas? I think a bright white would be too art-gallery, but I'm tempted to try a light cream. I think whatever I pick has to be matte, and my best experience of matte paint to date was the Fired Earth range.

[GinInAJamJar]

Natural Hessian. It is the magnolia of the 2010s but hell, I can't help loving it. Having practically remortgaged myself in tester pots and created chess boards of muted creams/beiges/browns in multiple rooms natural hessian keeps winning out...