Yeah, apparently the Pixel Qi company is a spin-off from OLPC, and that's the name I've heard in the context of color eink tech (took me a while to remember it). Defunct since 2015, however.
The page on the wiki.laptop.org isn't too clear on the technology—presumably it's more complex than just LCD and eink slapped together. The Wikipedia page on the XO laptop seems to have some detail: https://en.wikipedia.org/wiki/OLPC_XO#Display
