Rainbows Caused by Dark Matter?

Rainbow gravity is a new theory that could explain why we see rainbows in the universe. If it's true, light would be bent differently by dark matter and gravitational wells on Earth. The jury is still sort of out on this theory as there has been no evidence for it so far. It also means general relativity needs some work because very things actually do change when you put high energy particles at different energies into space.