Quoted from Green5:Which color was original?
I have a Volcano with good original back-glass, except for one spot. The windows are absolutely tinted green. When holding pure green next to it, you can tell it might contain a touch of blue/teal... very small amount. However if you hold blue next to it, it looks very green.
It might look like blue/cyan in photos from the front, but that's coming from the Futaba display. It's mostly green.