Both blue screens and green screens are used in chroma keying, a technique that allows you to overlay one image or video over another by removing a specific color range.
Green screens are more popular because they require less light and are easier to work with in digital editing. Click below for more info!
Green is also the furthest color from skin tones, making it advantageous for hosting and interviews.
Blue screens are favored for shooting scenes with human subjects, as blue can be used for darker settings. Click below for more details!
Blue screens work better with hair and in darker areas due to their richer contrast.