You may also occasionally prefer blue over green when objects or acror come in on
tact with the screen, producing unavoidable spill when color bou nces back off the screen.
It's always best to place your sub jects fa r away from the green background to avoid as much of this spill as possible although the brightness of the background ma y still bleed over onro smaller subjects with details in the video. This is especially important if you're shooting with standard-definicion analog camera equipment that has interlaced even/odd fields ro deal with. In compositing, blue spill is less offensive on hair and skir tones, especially in night shots or composites where t he scene includes a lot of cool-colored light.