Chroma keying is a visual effects technique used in film and video production to replace a specific color in a scene with another image or video. This method typically involves a bright green or blue background, which is easily distinguishable from human skin tones and other colors. By removing this background color, filmmakers can insert different backgrounds or effects, creating the illusion that subjects are in various locations or situations. The process of chroma keying relies on software that detects the chosen color and makes it transparent. This allows for seamless integration of the foreground subject with the new background. It is widely used in television, movies, and video games to enhance storytelling and visual appeal.