Nika Oxford Pillowcase Midnight For a subtle textured affair this beautiful all over seersucker style semi plain design is available in midnight navy or silver with a plain dye reverse. Keep it simple and style with the coordinating Kateri (Nika Midnight) or Navah (Nika Silver) accessories or add a layer of textured sophistication by layering in with the full Kateri or Navah designs. A beautifully soft to the touch design with a relaxed feel, in sumptuous cotton.