Chroma key: https://en.wikipedia.org/wiki/Chroma_key

An example of a green screen scene in a film: https://youtu.be/iUIZUIG--34?t=257

"Netflix invents new green-screen filming method using magenta light" (2023) https://news.ycombinator.com/item?id=36638598

Magenta Green Screen (MGS)

"Magenta Green Screen: Spectrally Multiplexed Alpha Matting with Deep Colorization" (2023) https://arxiv.org/abs/2306.13702

Color grading (post-processing) https://en.wikipedia.org/wiki/Color_grading