Black can be considered a colour, and is the result of the absence of, or complete absorption of, light. In Western culture, the colour black has typically been associated with evil, darkness, and witchcraft, but also with prestige and sophistication — appropriate for the rich and House of Black. Black has also been associated with life and prosperity by other cultures. In ancient China, black was the symbol of the element of water, which also corresponds to Slytherin , the Hogwarts house of almost all members of the Black family. In English heraldry, black represents darkness and ignorance; a possible allusion to the prejudice common to members of the House of Black.