White and black has the biggest visual contrast, this can easily be associated to other opposite concepts such as day and night or good and evil. White often represents purity or innocence in Western Civilization, particularly as white clothing or objects are easy to stain. In most Western countries white is the color worn by brides at weddings. Angels are typically depicted as clothed in white robes. Healing or "good" magic is called White magic. In early film Westerns the stereotypically "good guy" wore a white hat (earning them the name "White Hats") while the "bad guy" wore black (earning them the name "Black Hats"). This has given rise to the use of the names black hat and white hat for people who abuse and counter abuse of computer systems respectively. In popular culture this idea is sometimes reversed to play on reversal of stereotypes.