When choosing curtains for a classic interior, rich fabrics, quality sewing details and complex patterns can be preferred. Silk, velvet or quality cotton fabrics can create a classic atmosphere. Floral, damask or ornate motifs can reflect the characteristics of the classic style. The color choice can generally lean towards richer tones, such as dark reds, dark blues and greens. Details such as drapes and flounces used in curtains can complement classic interiors.