To provide a method for easily controlling colors at a low cost, to provide a substrate for an electro-optic device and a reflective semitransmission electro-optic device capable of maintaining both of the brightness in the reflection display and the chroma in the transmission display, and to decrease difference in the chroma between the reflection display and the transmission display.

A reflecting layer 211 having an opening 211a is formed on a substrate 201, and a color filter 212 having color layers 212r, 212g, 212b is formed thereon. A dense color part 212c is formed in the color layer on the opening 211a of the reflecting layer 211, while a pale color part 212d is formed on the reflecting layer 211. A region where no dense color part 212c is disposed is provided on the opening 211a (A), or a region where no pale color part 212d is disposed is provided on the reflecting layer 211 (B).