1. An image sensor comprising: a plurality of photoelectric conversion devices formed in a substrate; a first color filter formed over a first photoelectric conversion device and comprised of an organic material; and a second color filter formed over a second photoelectric conversion device and comprised of a plurality of inorganic layers, wherein the second color filter includes a lowest inorganic layer disposed closest to the substrate and includes a highest inorganic layer disposed furthest from the substrate, and wherein the lowest and highest inorganic layers are comprised of a same first inorganic material, and wherein the second color filter includes another inorganic layer comprised of a second inorganic material that is different from the first inorganic material, and wherein the second color filter does not include any other inorganic layer disposed above the highest inorganic layer further away from the substrate.