Why is my hand coulor differnt from my shin coulor?

Hey people i need some questions about my horrible hand, first my middle finger isn't straight its wonky it is not up staright same with all the other fingers. My other problem it on the top of my hand its black thats normal because im natural black but the edges of my hand its white so basically my skin coulors mixed and would some one plz help itz an emergency. PLEASE LOOK AT THIS POST I NEED HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!… I BEG OF YOU PLEASE =)