Bring the outside in with a splash of green at your window. . Associated with nature, renewal, and tranquillity, green is an excellent choice for creating a calming and soothing atmosphere in a room. Whatever the shade - darkest spruce, sage, duck egg, moss green or olive - green curtains can add a refreshing pop of colour to any decor style. Green curtains work well in both contemporary and traditional settings, and they can be paired with a variety of colour schemes.