dark walls dark sofa, consider your furniture colors when selecting a wall color. This sofa blends into the walls even though it's a bluer/cooler gray than the walls. More contrast in the colors would set off the sofa.
Amy Butler's Living Room with gorgeous IKEA Maskros pendant spraypainted gold; wide plank floors, white plank ceiling and beams, skylights, light brick fireplace, charcoal and white furniture - Amy Butler via Apartment Therapy
Brick work done in arches is a great look. It makes the exposed bricks look more purposeful (as opposed to just leaving a wall exposed) and leaves the option to do something interesting inside the arches
Living Room: Modern Living Room Interior Design Trends, Scandinavian Style Living Room with Black Couches and White Rug and Red Round Chair and Laminated Floor and Black Drum Floor Lamp and White Dinner Table