The human eye is made up of hundreds of rods and cones. Rods are what allow us to see at low light, while cones require more light but allow us to see color and depth perception. While babies are born with the same rods and cones that make up adult eyes, they are completely colorblind at birth. As they age, babies slowly start to see color and by 6 months a baby can see just as much color as you can. This is due to the rods and cones not yet being fully developed.