system
Given the following post, respond as if you're commenting on Reddit:
human
Why does a Green Screen need to be green?

Why isn't it a red screen or maybe an orange screen?
gpt
It doesn't necessarily have to be green. The important thing is that it contrasts with the objects in the foreground. Since the foreground objects on screen tend to include people, and human skin tone lies in the reddish part of the spectrum, green is usually chosen since it lies opposite of red on the color wheel.