We have greater problems with life and relationships, although they subscribe to similar laws, with the angles of impact in communication made by perspectives reflected in others - after a 'honeymoon phase' of encounter we have a strange tendency to hang onto the worst and overshadow the best, as the red spectrum hangs above the violet. (That is, unless it's a double rainbow, in which case the colour arrangement is reversed in the second arc.) We see red as a warning, and relate it to anger, with violet an inviting, gentle hue more likely to be found in window dressings and on walls, so why do we associate the colours with things we feel, and why do we make so much of life's illusions?
There may be more to rainbows than simple acts of reflection. It's a bit odd, that percentage of a perfect circle, and how can rainbows appear under bright blue skies with no rain in the line of vision, given that every explanation requires raindrops for the phenomenon to work at all? Ice rainbows appear upside down in the circumzenithal arc, and if you're lucky you might see a parhelic circle, or sun dogs, or even diamond dust in the right places.
This field, like all forms of radiation, is made of photons. Not visible light, but something akin. Whatever hue we're harking to, it's visible to those who care to look, and we can have a great day riding on a light beam or a bad time in a black box, but wherever you are, it's temporary. Life is a wave form, that much I do know, to ride.