What is unique about German Dornfelder wines?

German Dornfelder wines are indeed unique because they are very deeply coloured. This grape variety is known for producing red wines that have an intense, dark hue, which is often a characteristic sought after by winemakers. The deep color is due to the grape's thick skin, which is rich in anthocyanins, the compounds responsible for red coloring in wine. This attribute not only enhances the visual appeal of the wine but also contributes to its overall flavor profile and aging potential, leading to a quality that stands out in the German wine market.

While Dornfelder wines can exhibit a range of sweetness levels, including dry, semi-dry, and sweet styles, they are not always sweet, making the statement about sweetness less accurate. The assertion about high acidity and high aromatics also does not capture the essence of this variety as distinctly as the reference to its deep color. Thus, the deep coloration is what truly sets Dornfelder apart from other wines.