Colour E Ink explained: is it worth it?
Kaleido colour looks tempting, but there's a sharpness tax. Plus what warm light and waterproofing give you.
By the Let’s Compare Editorial Team · 1 min read · Updated September 24, 2026
Is a colour e-reader worth it? For comics and magazines it's tempting, but colour E Ink carries a trade-off you won't spot in a product photo. And a couple of less flashy features may change your reading more.
Colour vs mono E Ink (Kaleido 3)
| Content | Resolution |
|---|---|
| Colour | 150 ppi (4,096 colours) |
| Black-and-white text | 300 ppi |
The colour sharpness tax
Today's colour readers use E Ink's Kaleido technology, which overlays a colour filter on a monochrome panel. That splits the resolution. Kaleido 3 shows colour at just 150 ppi while keeping a sharp 300 ppi for black-and-white text, across a palette of 4,096 colours. On shipping devices the effect is stark: the PocketBook InkPad Color drops to about 100 dpi when showing colour and rises to 300 dpi in monochrome.
For novels, then, a good black-and-white reader still wins. Text stays crisp at 300 ppi, and colour adds nothing to a page of prose. Colour earns its place if you read comics, manga, magazines or study materials with charts.
Warm light for night reading
A front light lets you read in the dark, but for bedtime you want an adjustable warm light. Kobo's ComfortLight PRO, for example, shifts the screen from daytime white to a nighttime orange to limit blue-light exposure before sleep. If you read at night, we'd rank this above almost any other extra.
Waterproofing
Many mid-range readers now carry an IPX8 rating. The waterproof Kindle Paperwhite, for instance, is protected for up to 60 minutes in fresh water no deeper than two metres. That covers the bath, the beach and the poolside, which is where plenty of reading happens anyway. It's one of the most useful features to look for, and it's no longer premium-only.
Related explainers
- Kindle vs Kobo: which e-reader ecosystem suits you?
The screens are similar. What really separates them is where your books come from and what files you can read.
Sources & further reading
The facts and figures in this article come from the references below (some of them not in English), so you can check them yourself.
- E Ink Kaleido 3 — E Ink
- Colour E Ink resolution tradeoff on the PocketBook InkPad Color — Notebookcheck
- Kindle Paperwhite IPX8 waterproofing — Notebookcheck
- Adjust ComfortLight PRO warm light on your Kobo eReader — Rakuten Kobo