There are many things you can do to produce and play with colour. the size of the frequency band of light can have an effect on the colour, mixing bands can sometimes have interesting effects especially if they flicker at different rates on colour, playing with the chirality of the light source can have interesting effects on colour, pixel geometry can have interesting effects on colour, electron density can have an effect on colour, Holographic geometry can have interesting effects on colour.
all in all there's a lot more to be explored about colour.