The implementation of a Cyan color filter in a 40nm Backside-Illuminated (BSI) CMOS Image Sensor represents a strategic shift from standard RGB arrays to patterns incorporating complementary colors (such as CMYG) P4.While primary color filters transmit only a narrow band of light, broadband complementary filters like cyan transmit both green and blue light, effectively reshaping the overall spectral profile of incident light and significantly increasing optical throughput P4.This enhanced photon