Window treatments can make a space attractive, cozy and can create a wonderful effect. If you chose the right fabric, pattern and color of the curtain then, it will certainly tie the whole room together. You can brighten up a room with patterns. If you are not afraid in using bold colors then, just play with it. It might give your space the appearance that you need. Bold colors can be toned down when you accessorized with lighter and neutral colors.
Bring in some neutral colors of throw pillows and rugs. If you have a higher ceiling, use drapery to get that sophisticated look. Oh, I got these ideas from watching HGTV shows. It works for me and I hope it will work for you too. Enjoy decorating your home.