But observers say the technology is likely to remain a niche product.
Most are only available in China, but two models have been released globally.
Those are thePocketbook Colorand theOnyx Boox Poke 2 Color.
PocketBook
But color E Ink screens still have their limitations, Hoffelder said.
The color screens are more expensive to produce, and thus the devices cost more.
For example, the Pocketbook Color costs $199 while the Onyx Boox Poke 2 Color costs $279.
Klaus Vedfelt / Getty Images
Thats significantly higher compared to Amazons popular Kindle black and white eReader, which starts at $89.
E Ink screens are also much slower than LCD and LED screens, Hoffelder noted.
Pat proposed the idea of integrating color E Ink screens into the back of phones, alongside regular screens.
TheHisense A5C Smartphonewas the first E Ink smartphone to use color ePaper.
It was followed by theHisense A5 Pro Smartphone, which features a faster refresh rate.
Theres no word yet, though, on whether Amazon plans to produce a color Kindle.
Jeff, are you listening?
