[bilky asko]

I was never a fan of green screen as opposed to blue. It always seemed to be blue then for some reason green seemed to become flavour of the month. In analogue terms blue gives the largest signal for the keying equipment to work with (chromakey etc works on colour-difference signals not the actual colour itself) and green pretty much gives the smallest so I never really quite knew why the change. Of course today’s cameras are more sensitive overall and digital signal processing techniques have transformed what can be done.

I'm sure I've read before (likely on TV Forum) that digital camera sensors are much more sensitive to green, making it the better colour over blue for keying, and being part of making it easier to light.