The Cabernet grape is a variety of red wine grape that is widely grown in many parts of the world. It is one of the most popular and widely planted grapes, and is often blended with other varieties such as Merlot. Merlot is a dark blue-colored grape variety that is used in the production of red wines. It is known for its soft, velvety tannins and its ability to produce wines with a deep, rich flavor.