A transflective electrooptic device is provided with an opening formed in a colored layer provided on the reflecting section of a transflective layer. The opening has an elliptical two-dimensional shape, and can be formed, in a patterning process, by a mask pattern having a two-dimensional shape without any corners, such as an elliptical shape. Such an opening makes it possible to inhibit fluctuations in the opening shape and opening area during a patterning operation with respect to the colored layer, and reduces variations in the opening area, thereby increasing the color reproducibility of the reflective display.