The red color can be derived from a vast assortment of grape varietals ranging from grapes that are reddish to deep purple. It is the grapeskins that are responsible for the red wine’s distinct color spectrum. The skins are in contact with the juice during fermentation, allowing color and tannins to immerse into the juice. The individual wine’s particular red hue depends on the grape type process and the length of time the skin is in contact with juice.