Imagine that a rainbow is energy traveling at the speed of light. Then it connects with an object that causes it to refract like a prism. Here's what you need to consider, if we are all standing in a different place when we look at a rainbow, and our eyeballs are reaching the light at a different space-time continuum, then it would be impossible for us to see the same saturation of colors and perspective... even when someone is standing right next to us. So the bottom line, you get to experience seeing your VERY OWN RAINBOW!
For more INsight go to: http://www.huffingtonpost.com/2013/08/31/facts-about-rainbows_n_3779801.html