Not an answer to your question, merely an amusing anecdote, but Windows used to use a green screen (different shade though) to render videos.

“The media player program didn’t render the video pixels to the screen,” … Instead, Windows would render a green screen (or a different color, depending on the version), then “render the video pixels to a graphics surface shared with the graphics card.” The final step was to “tell the graphics card that whenever it sees a green pixel about to be written to the screen, it should substitute a pixel from that shared graphics surface.”

–Windows used to secretly use green screens to render videos, which is how you could trick MS Paint into becoming a video player

Edit: Ninja’d by @[email protected]