For rooms with busy interiors, interior designers generally recommend delicately pattered or symmetrically designed area rugs, with subdued coloring. Such hearth rug styles compliment a room without overpowering existing artistry. Look for a hearth rug with colors that blend well with existing paint, furniture, and other design elements. Keep in mind any furniture upholstery patterns or ornate wallpaper that might go best with a subdued, non-competitive area rug design.