Using monochromatic shades give a space a consistent calming feel. As illustrated in this space, the room is composed of shades of white, grey, and black. Here the designer has added teal, turquoise, and even orange to draw the eye. Note the different textures in the room. Designing with monochromatic shades is one of the easiest routes to take. You can have so much fun with accessories and texture.
In this picture, the short wall is clearly not the ideal spot to place the sofa. Perhaps the larger wall to the right would be best. The sofa would face out towards the window, and a chair with table could work on the facing wall. Scale and placement should always be determined by a professional prior to purchasing.
Symmetry plays a huge part in a room feeling balanced. This room has balance on both sides by mirroring sofas and chairs anchored by the tufted ottoman. The weight and effect in the space are balanced and centered with the fireplace. Note the placement of the floor lamp and the buffet and the contrast of the rug with the upholstery. The décor on the shelves is minimalist and clean, yet provides pops of color. This is important to achieve the right balance in the room.
As illustrated, it's important to cross-pollinate color in various elements. Here you see gold in the pillow, lighting, and chair. This will complete the room and offer a color you love and are committed to.