Home remedies are best for pink lips as these are safe and have no side effects. Home remedies do take a long time but are good for the skin in the long run. What I found effective for pink lips is applying a mixture of lemon juice and honey on lips and keeping it for half an hour. Lemon is a good bleaching agent and it gives pink lips. It also gets rid of dead skin cells thus making the lips smooth. Honey is a good moisturiser that maintains soft lips.