Suntan vanishes after some time, still if you want to do it quickly there are many natural ways to get rid of it.
Lemon juice, cucumber & rose water face pack.
Lemon helps to reduce tanning while Rosewater and cucumber are useful for skin inflammation.
You need to add one tablespoon of each and apply on the face for 15 minutes and then wash off the pack with cool water.
You can also add Red Sandalwood powder to this face pack , which easily available or nearby ayurvedic store