A monolithic color line sensor having a plurality of photoelectric converter arrays, such as three photoelectric converter arrays, each one thereof being associated with respective color filters corresponding to one of the primary colors red, green and blue. The photoelectric arrays are formed in respectively different well regions of the semiconductor substrate and which well regions are, furthermore, formed as laterally elongated well regions along a common lateral direction and which well regions are also respectively spaced-apart from each other along a vertical direction which is orthogonal to said lateral direction with respect to a common plane. The monolithic color line sensor is further associated with a read-out operation for time-serially outputting the signals from the photoelectric converters via corresponding pixel signal lines.