Want to restore my natural skin color??? IF possible?

Okay, first off I am african american(black). so if you have smart comments dnt bother. Okay so my natural skin color was like chocolate, brown or almost a darkish brown, but it wasnt like extremely black. During the summer i have cheer practice and i've gotten sunburned. So now there are little black spots and patches on my leg from sunburn damage. I want to know how to restore my skin back to its natural color if possible. Remedies, products, anything. Also, my knees are kind of black help there too.!