The two most important things to consider when helping a buyer select window coverings are function and design.
The main point to remember is that a well-designed window covering suits not only the window, but also harmonizes with the room. The window treatments should be to scale with the room itself and with its furnishings.
Think about what other interior selections you need to consider when choosing colors, styles and textures.
Ask yourself what feeling or mood you want to create in the rooms. The mood of a room can be soft and elegant, casual and comfortable, classic and traditional or clean and contemporary. The activities that will take place in the room will usually determine the mood or feeling you want the room to evoke.
Also consider the actual architectural style of the window itself.
When selecting colors for windows think about what effect you want to create. If you want the window to add drama and be a focal point, use contrasting colors to the wall color. On the other hand, if you want to make the room look larger, blend or coordinate the window and wall colors.