E Ink Kaleido 4 Doubles Colors to 40,000 on Color Ereaders

What E Ink actually improved with Kaleido 4

The pitch is simple: less grain, more color, better light. E Ink says Kaleido 4 delivers over 40,000 colors, double what Kaleido 3 can show, and reduces the screen graininess that has made color e-paper feel like a compromise.

Color e-paper has always been a trade-off. You get muted shades and a darker, grainier background than a black-and-white panel, which is why most readers still choose a monochrome Kindle or Kobo for plain text. E Ink's claim that Kaleido 4 reduces the perception of graininess matters more than the color count, because it suggests text might finally look as clean as it does on a standard e-reader.

The numbers back up a meaningful step. White reflectance is up 15%, contrast is up 50%, and the refresh rate is higher, with video playback at 18fps. That last figure is technically impressive and practically useless for most people, but it hints at a faster panel overall, which could make page turns and menus feel snappier.

• Over 40,000 colors, double Kaleido 3
• 15% more white reflectance
• 50% better contrast
• Higher refresh rate, 18fps video

Why the first Kaleido 4 device is a problem

The technology is only available on Hanvon Technology's M10 C II, a China-only E Ink tablet. That means readers in the US, UK and Europe cannot buy a Kaleido 4 device yet, and there is no confirmed date for when that changes.

E Ink supplies screens to other companies, so an announcement like this is usually a preview of what is coming rather than a product you can buy today. Kobo, Boox and ViWoods have all used Kaleido panels before, and Amazon's Kindle Colorsoft runs on E Ink color tech too. But Amazon just launched a new Colorsoft, which makes a Kaleido 4 version unlikely in the near term.

The bigger question is price. Color e-readers already carry a premium over black-and-white models, and a brighter, more colorful panel will not make them cheaper. If Kaleido 4 closes the clarity gap, that premium becomes easier to justify. If it does not, buyers will keep saving money and sticking with grayscale.

What it means for you

There is no US, UK or EU availability for Kaleido 4 yet. The only announced device, Hanvon's M10 C II, is sold in China, and E Ink has not named a Western brand or a release window.

Expect Kobo, Boox or Amazon to adopt the panel eventually, but nothing is confirmed. Pricing is also unannounced. Kaleido 3 devices typically cost more than equivalent black-and-white models, and that gap is unlikely to shrink with a brighter, more complex panel.

If you are in the market for a color e-reader now, the current Kindle Colorsoft or a Kobo Libra Colour remain your options. Waiting for Kaleido 4 could mean months or years, depending on how quickly E Ink's partners move.

Availability and pricing

There is no US, UK or EU availability for Kaleido 4 yet. The only announced device, Hanvon's M10 C II, is sold in China, and E Ink has not named a Western brand or a release window. Expect Kobo, Boox or Amazon to adopt the panel eventually, but nothing is confirmed.

Pricing is also unannounced. Kaleido 3 devices typically cost more than equivalent black-and-white models, and that gap is unlikely to shrink with a brighter, more complex panel.

Kaleido 4 looks like the upgrade color e-readers have needed for years, but the hardware is stuck in China for now. Until Kobo, Boox or Amazon ship it, the improvement stays a promise rather than a product you can buy.