I think there is just one forum member who called the black Libra's screen 'green'. Here's a side by side pic I made with the Clara. If the Libra screens are green then all the Clara screens are green too.
It also makes absolutely no sense for there being any screen tint difference between white and black Libra's. That would mean there would be some deliberate hardware difference between these two models (except the color of the plastic) and why on earth would Kobo do that. It would also only complicate production greatly.
There is however a
perceived color difference due having a white or black frame around the screen.
