"Once upon a time, the possibility of a color e-reader seemed a reality just around the bend. As the sun set on the 2000s, though, prototypes and the potential for multi-hued e-paper devices seemed to disappear. In this issue of our weekly, Sean Buckley examines the events surrounding the once bright future of the tech and why we're still e-reading in black-and-white."
Source:
http://www.engadget.com/2013/08/30/d...color-e-paper/