You see how the brain does white balancing quite clearly when working with LED lights optimised for salad, for example. The light has very little green in it and looks nearly pink. After a few minutes it looks less pink and nearly normal (depending on the lamps). Then go outside in daylight and everything suddenly look green, which takes a minute to go back to normal. The brain adds the green it perceives to be missing, and removes it again when it isn’t needed.