Dear Nurf ~ I don't know whether you can be more explicit with your question here. If the color purple did not exist, would what happen? If something does not exist, it is not in existence. The word "purple" exists, so it must be describing something.
Is there something related to the color purple - like the movie - which you have been considering? What would you like to happen with the appearance of the color purple? Like plums? Maybe you work in the area of arts and design and would be missing something if you couldn't use the color purple? Put together blue and red and there you have it. If you dream it, then it must be so.