These are all of the Color E INK e-Readers from 2020 - Good e-Reader

This year E INK released Kaleido, a new form of color e-paper that was designed for e-readers, e-notes and smartphones. Most of these devices have 300 PPI to read black and white content, such as ebooks. These devices can display 4,096 different color combinations up to 100 PPI. The way the technology works, is that you can read both black and white text at 300 PPI and colors at 100 PPI, on the same page. This is useful if you are reading a biography ebook, where there are tons of pictures in the center, and also text, giving readers context.
This year E INK released Kaleido, a new form of color e-paper that was designed for e-readers, e-notes and smartphones. Most of these devices have 300 PPI to read black and white content, such as ebooks. These devices can display 4,096 different color combinations up to 100 PPI. The way the technology works, is that you can read both black and white text at 300 PPI and colors at 100 PPI, on the same page. This is useful if you are reading a biography ebook, where there are tons of pictures in the center, and also text, giving readers context. It also works using a web-browser, or other ebooks. The B&W and Color filter have a hard time with PDF files, because they are basically big image files, although some PDF render engines can convert the PDF images to pictures AND text. CBR/CBZ, are popular formats for comics or manga, but they are basically containers for a series of jpg/png files.