Tips To Regain...the darkened Face, Natural colour......?

okkkkk.....Am a 18 yr old Boy....i USe to be Fair when i was a kid,,,, but due to my carelessness...my face colour has beennn darkened..and my body clr is the same....can u guys help me outwith some TIPS to regain my face natural colour.........through some home remedies ...also that too, not be very costly