How do you know that a prism doesn’t generate the colors? Cool RadioLab story of Newton and color. They even interpret color into song to help listeners to understand color vision!
Book “Color: a natural history of the palette" by Victora Finlay
“We tear into this show with a dark scene from 1665. A young Isaac Newton, hoping to ride out the plague by heading to the country to puzzle over the deep mysteries of the universe, finds himself wondering about light.”