We offer custom RV pleated window day/night shades that can be made to your exact measurements, including the 66-1/2" width and 24-26" height you provided. For accurate color matching, we recommend ordering a sample pack of our available fabric swatches, including popular colors like Cotton and Linen Beige, which appear to be close matches based on your photos. You can view and order these swatches through our website. Providing physical swatches will ensure you select the perfect color for your replacement shades. If you need assistance placing an order or have further questions, our customer care team is ready to help.