Which alcohol has blue tint?

The alcohol that has a blue tint is called Blue Curaçao. It is a liqueur that is made from the dried peel of the Laraha citrus fruit, which is native to the Caribbean island of Curaçao. Blue Curaçao is commonly used as a flavouring agent in tropical cocktails and mixed drinks. The blue colour of the liqueur is typically achieved through the addition of artificial colouring.