Lime or lemon juice, turmeric, honey, etc are natural bleach that improve complexion. They remove tan and make your skin fairer. (Note that lemon juice is more effective than lime juice for getting fair complexion). Cucumber juice can be applied on dry as well as oily skin to get fair complexion. To make cucumber juice, grate (kaddukash) cucumber (with skin) and squeeze it. Only 1/2 to 1 teaspoon is sufficient for a single application.