There are two main factors that affect skin color:

One, genetic factors. This is determined by our parents and there is nothing we can do to decide or change it. If your parents had good skin texture and complexion when they were young, then you don't need to worry, your skin color is only caused by the change of external conditions, you just need to pay more attention to maintenance and attention in general, to prevent excessive sun exposure and so on. (In this case it is also possible for the offspring to have a genetically black skin color, but this is only a quarter of the time because the genes for a lighter skin color are dominant.) If your parents also had a darker skin color when they were children, then genetically your skin color must be black. (Because black skin color is a recessive trait.) But even in this case there is no need to be sad, cosmetics nowadays can't genetically change your skin color, but appearance can.

Two, environmental factors. Maybe you were a child because of frequent exposure to the sun and other reasons lead to darker skin color, which can not worry about, pay attention to it later. So the appropriate use of some suitable cosmetics to improve the skin has certain benefits.

Whether it is due to environmental factors or hereditary factors that you have become darker, this is not a big deal, and can be changed with the help of cosmetics and other cosmetic changes in appearance.

I don't know whether you are a MM or a handsome pot, if you are a MM, then it is better to change as much as possible; if you are a handsome pot, I think there is nothing wrong with a little darker skin color. A "dark skin" is usually used to describe a strong, brave boy.