My hands are dark compared to my inner hands and body, i know this s due to sun light. is there any remedy to make my hands back to normal colour?

Sunscreen: If a one's hands are tanned, and he doesn't like the natural tanned appearance, he can use sunscreen on his hands whenever he is outdoors. Over time, his hands will become less tanned. Some people retain their tanned color for a couple of years, even if protected from the sun... That's just the way nature is. One can also visit a dermatologist for lightening cream, if very unhappy about the tan.