Newly built or recently renovated apartments and rentals often feature a palette dominated by cold shades of gray and white: from the walls, flooring, and built-in furniture to the tiling, fixtures, and even the building’s exterior. You can cost-effectively liven up this dreary, dull, and sterile environment by adding vibrant accessories to the rooms. For a truly unique and lively look, choose two – or at most three – vibrant or moderately bright colors that harmonize well with each other. Make sure to incorporate them at various points throughout the room.