Color is of first importance in the decorative effect of window-hangings. White curtains may be appropriate in a room with white woodwork, white ceiling, and light walls, for they are in such case in harmony with the general color scheme, but they are not appropriate for rooms of darker color. Window-hangings should generally harmonize in hue with the walls of the room. If the hangings are of exactly the same color as the side wall, the result is likely to be monotonous. But if the room is small, the openings many, and the other furnishings in strong color contrast to the walls, a close match in color between walls and draperies may produce a most restful effect. If the walls are plain and not covered with pictures and other objects that attract undue attention, the draperies may be stronger in color and more pronounced in pattern, constituting the strong decorative note in the room. In general, provided the colors are harmonious and the pattern not too pronounced, it is safe to use striped or figured draperies with plain walls, and plain draperies with walls that have a pattern. Figured draperies may be used effectively with striped wall covering. The best designs for drapery, as for wall covering, are those that cover the ground and present no violent contrast in color or pattern.

Window draperies may contribute largely to the color effects described in rooms of different exposure, or of different localities. The warmth and light contained in soft tones of yellow and orange can be counted on to counteract a feeling of cold and gloom. Darker and cooler colors may be used when there is much sun or heat.