A brewed black tea can range in color from amber to red to dark brown, and its flavor profile can range from savory to sweet, depending on how long it was oxidized and how it was it was heat processed. Generally, black tea is stronger, bolder and richer than green tea. Black tea typically has more astringency and bitterness than green tea, but if brewed correctly it should be smooth and flavorful. Black tea is grown and processed all over the world in varying geographies and climates. Three of the largest producers of black tea today are India, Sri Lanka and Africa.