Question

how can we change our skin colour

Answer 1

i think you want white skin

Answer 2

Well it's a very tricky one ... but still I will try ...
that if you want to be black then do intense workout and playing and running in afternoon or full sun light in day time ....

or if you want to be lighter then stay away from the sunlight always stay in air conditioning ....
and use cosmetic if you wish ... other wise use alovera ....

hope this will help you.
thank you