Kaleido screens, meanwhile, apply a color filter over a black and white screen. One reason E Ink Gallery 3 displays aren’t more widely used though is that they have relatively slow refresh rates ...

It's the first Kindle to offer a color E Ink Kaleido 3 display ... You can even reverse the screen from a white background to black, which is handy for reading at night without too much light ...

A manufacturer reintroduced Dark Lilac, a limited-edition ink, to great fanfare. The only problem? The color had changed. By Scott Cacciola Lamy, a German pen manufacturer, made a recent splash ...