Nothing at all.
On the surface, a rainbow
Is light from the sun being split and splintered into its colored components.
There’s more to it, surely
Length and arc
And the necessary atmospheric conditions
As in you need water
Though I don’t have the scientific background to speak on it.
That’s not to say it isn’t beautiful
Rainbows are facets of nature that never fail to amaze
Both the aged and the young, man or woman, less so the color-blind.
Adopted as a symbol of love
But that’s it
A picturesque arc of color
Why does there need to be more?
A rainbow is a rainbow is a rainbow
Red Orange Yellow Green Blue Indigo
And that’s it.