Electrochromic effect refers to the electrically tunable coloration of a matter. Emerging see-through color-tunable applications pose a synergetic demand on electrochromic device, concurrently having ultralow field driving, operation in transmissive mode, and high-purity and tunable interference colors of sci-fi perception. However, such an electrochromic device remains elusive. Herein, we invent a transmissive electro-interference-color device based on two-dimensional titania liquid crystals (2D TiO