Fabric sample books help you match the right curtain colors for home decorations. Swatch booklets areunreturnable. The color varies due to different dye lots. Test swatches in your room's lighting. Hold them against walls, furniture, and flooring to assess undertones. Check the swatch under natural light (morning/afternoon), evening lamps, and with/without curtains closed. This helps you anticipate how the final product will look. If you plan to add blackout or thermal lining, order a lining swatch booklet to see how it affects color depth. Learn more about the fabric color difference here.