How to get skin colour to natural after an accident wound

I got into a scooty accident after drunk driving (please forgive me, no one else was hurt except me and my beloved scooty).

The wounds have healed and the pain is over but I'm left with a 3x3 inches of new pink skin on my right leg.

I need to get it back to natural colour before I go home for diwali. I only have 20 days.

Please recommend me something.

I'm M28 if that helps.