Color perception is not innate but acquired after birth

Testing was performed to confirm whether or not early experience is necessary for color perception. Infant monkey were reared for nearly a year in a separate room where the illumination came from only monochromatic lights and after extensive training they were able to perform color matching. But, their judgement of color similarity was quite different from that of normal animals. The results indicate that early visual experience is also indispensable for normal color perception.