Modelo Dark or Modelo Black

Negra Modelo is a type of beer from Mexico. Modelo is the brand. Negra is the type. Since the word "Modelo" is a brand name it is improper to translate it. The word Negra (and Negro) literally means "Black" in English. In this case it refers to a dark beer or ale, so "Dark" is the best translation.

The word "modelo" literally means model in English. The word is always modelo whether it's referring to a female, male, or inanimate model of any kind.