In order to see this light, it must become imperfect. So bend the light, and now it is imperfect. Imperfect light breaks down into color. If you bend a prism it will reflect a color, bend it some more and the color changes. Remember this light is pure, and in order for it to become visible, it must be curved or bent.
Color is energy, just as perfect light is energy.
It just does not have the power of perfect light. Think of the color red. This is the strongest color. It is an aggressive color because of where Mars is in the Universe, when the light hits it from the sun, it comes to us as the color red. The planet is red because of the red ray reflecting off of it.