experience the color yellow, as opposed to classifying a visual stimulus as being of a certain wavelength Purple is the weird one as it doesn't correspond to a

experience the color yellow, as opposed to classifying a visual stimulus as being of a certain wavelength Purple is the weird one as it doesn't correspond to a wavelength, but can only be represented by a set. Edit - all colours correspond to sets of sets, if you think about it, as you can experience exactly the same colour for essentially an infinite set of different sets of frequencies.