In the context of color perception, how does the concept of saturation relate to the appearance of colors in a rainbow observed after a rain shower?

Colors with high saturation appear more vibrant because they consist of a narrow range of wavelengths.

 Colors with low saturation appear more vibrant because they consist of a wide range of wavelengths.

 Saturation has no effect on the appearance of colors in a rainbow. 

The saturation of colors in a rainbow is determined by the angle of sunlight.