Dark elves, known as Ssri-tel-quessir in the elven tongue, are frequently confused with drow. It doesn't help that the two terms are often times used interchangeably, even by elves (Tel-quessir) themselves.
Dark elves have skin that varies from taupe to dark brown, as opposed to the charcoal skin that drow have. They also have black hair instead of white and poor night vision.
The Dark Elves are a race of harsh, warlike and vicious Elves. They are cruel, sadistic raiders with much disdain for all other races, especially their lighter kindred the High Elves. Many believe they are the most pure evil of all races of elves. Unlike the High Elves, who continually seek to suppress their passions lest they be overcome by them, the Dark Elves willingly embrace their hedonistic nature. Dark Elf society emphasizes individualism, selfishness, and pride. They have little regard for one another and even less for the other races of the world, whom they see as potential slaves and subjects.
Dark Elf society is quite often harsh and brutal, as one would expect from a people driven by the reverence of Khaela Mensha Khaine (The Bloody Handed God) and in no small part to the worship of the Chaos Gods, especially Slaanesh. Most Dark Elves worship both Khaine and Slaanesh in the same way that others will revere many gods according to their desires.
From an early age Dark Elf children are taught that upon their death they will join Khaela Mensha Khaine in his kingdom and that His way is the way of all things; all blood belongs to the Lord of Murder and the more blood is spilt the greater their rewards will be when they die and their souls depart for the kingdom of Khaine. This is the main reason in which many thousands of captives are ritually sacrificed upon the alters of Khaine throughout the year, each one is an offering to the Bloody-Handed God.