title_body: Is there any e-ink technology that can display colors?
upvoted_answer: E-ink have had their Triton technology for a few years, which has been available in several commercial products: Hanvon color eReader, JetBook Color and PocketBook Color Lux.
  
  I cannot find the reference, but IIRC there are multiple layers through which the light needs to reflect. Therefore the lighting conditions need to be better than for monochrome eInk displays.