Anecdotally, in my first year of university a tutor of mine did a demonstration on Fechner Colour. We walked into the lab and he had a spinning disc on a motor,

Anecdotally, in my first year of university a tutor of mine did a demonstration on Fechner Colour. We walked into the lab and he had a spinning disc on a motor, that was apparently pink in colour. He asked the class (*first year students) what colours we thought each half of the disc were to create the pink shade. Most people guessed pink and white, while a couple of people had correct guesses.. When he stopped the motor, the disc spun down and it was yellow on one side, and blue on the other.