An image sensor comprising: a first layer having a plurality of groups of photodiodes formed in a semiconductor substrate, each group representing a 2×2 array of photodiodes, with 2 first pixels configured to detect light of a first wavelength and 2 second pixels configured to detect light of a second wavelength, each first pixel positioned adjacent to the second pixels; and a second layer overlapping the first layer, the second layer is organic, having a plurality of organic photodiodes configured to detect light of a third wavelength, each organic photodiode positioned to partially overlap 2 first photodiodes and 2 second photodiodes of the first layer.