Dark roast coffee has been through a long, hot roasting process. This produces dark brown beans, a bold and deep flavor, and oiliness on the beans' surface that gives them a light sheen.  Popular options for dark roasting are: Continental roast, espresso roast, Italian roast, French Roast, New Orleans roast, and Vienna Roast. French roast coffee is considered to be one of the most intense among the many dark roasts available. Dark roasts can range from barely dark all the way to almost charred. Dark roast coffee has less caffeine than other varieties of coffee.