title_body: Is there any e-ink technology that can display colors? I had opportunity to buy a Kindle Paperwhite and I was looking for an equivalent which support colors. Amazon have the Kindle Fire but it is a tablet technology which is not comparable to the e-ink. 
  
  The reader with e-Ink are (for my usage) superior for the battery life (several weeks without charging) and for the readability under bright place (sunny).
  
  My question is: do you know any device with color e-ink, and if it does not, do you have proof that it can be real one day?
  
  I hope my question is not too opinion centric, I am looking for facts not opinions.
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.