<b>cliche</b>: first off, i love the avitar. how very cliche.
when you shine white light on an orange, it reflects everything it's supposed to, because white is the amalgamation of all colours, so the orange can reflect all of the colours it's supposed to reflect. now turn off the white light and turn on a red light. the orange, along with everything else, will be a shade of red, because that is the only light available to reflect. in the absence of any light, there is nothing to reflect, so it isn't anything.