Skin darkens with the sun no matter what skin type or color it is, for the most part. However, there are rare occasions when a person’s skin does not contain pigment due to disease or disorder. In this case, their skin can’t become lighter or darker with the sun. However, for most people, they can stay in the sun and their skin will either get tanner or redder but it will get darker in color. So, the opposite should happen.
If you stay out of the sun, then your skin should get lighter and lighter as time goes on. However, you would have to completely stay out of the sun or wear clothing that completely covered all of the person’s skin.