There are many types of tea, which differ in their taste, color and caffeine content. The main types of tea are black tea, green tea, oolong tea and white tea. Black tea is the most common type of tea and is obtained by leaving the tea leaves to ferment for several hours. It has a strong and robust flavor and a dark color. Green tea, on the other hand, is produced by stopping the fermentation of tea leaves shortly after their harvest. It has a softer and cooler flavor than black tea and a lighter color. Oolong tea is a semi-fermented tea that has an intermediate flavor and color between black tea and green tea. White tea is produced from the youngest leaves and buds of the tea shrub and has a soft and light flavor.