MangaConverter

Erase colour rainbow artefacts on e-ink

Colour e-ink screens render tone with a grid of coloured subpixels, and on fine detail that grid can show through as faint rainbow speckle: a shimmer of stray colour along edges and across flat greys that was never in the original page. Erasing that rainbow cleans the speckle so a page reads as the artist drew it on a Kindle Colorsoft or a Kobo colour reader.

Here is the honest position: the underlying rainbow eraser exists inside the conversion pipeline, but we do not expose it as a working option you can switch on yet. So this page ranks for the query and explains the fix, and it deliberately shows no convert button that would pretend to apply something we have not wired. The live converters below are real and ready today.

The rainbow eraser is coming soon

This option is not exposed yet. We will not fake it. Browse the working converters in the meantime.

See the tools that are live today

What the rainbow eraser will do

  1. Target the speckle

    It will detect the stray subpixel colour that appears on fine detail and flat greys, the shimmer that colour e-ink introduces but the page never had.

  2. Clean without dulling

    The aim is to remove the false colour while leaving the real colour untouched, so a genuinely colourful page stays vivid and only the artefacts go.

  3. Run inside conversion

    When exposed, the eraser will be a step in the existing pipeline, so a cleaned page flows straight on to device sizing and the rest.

  4. Convert with what is live today

    Until then, the working converters handle colour output, device sizing and contrast now. Start with those from the tools hub.

Honesty first

We would rather rank for this query with a truthful coming-soon page than expose a half-wired toggle that quietly changes nothing. The option appears here when it genuinely works.

Colour tools that help now

Keeping pages in colour and correcting contrast are live today and already improve how a colour comic reads on e-ink, even before the dedicated eraser ships.

Frequently asked questions

Can I erase the rainbow here right now?

Not yet, and we will not fake it. The eraser exists in the pipeline but is not exposed as a working option, so this page describes the fix honestly rather than offering a button that does nothing.

What causes the rainbow on colour e-ink?

Colour e-ink builds tone from a grid of coloured subpixels. On fine linework and flat greys that grid can show through as faint coloured speckle, a shimmer of colour the original page never contained.

Is this the same as keeping comics in colour?

No. Keeping colour is a live feature that stops colour pages being flattened to grey. Erasing the rainbow is a separate, not-yet-exposed cleanup that removes false colour the screen adds. Keeping colour works today; the eraser is coming.

What can I do in the meantime?

Convert with your colour reader profile and keep colour on, which already gives the best live result. Contrast correction can also reduce how much stray speckle stands out on a page.

MangaConverter runs on Kindle Comic Converter (KCC), the open-source engine, for the conversions that are live today. The rainbow eraser lives in that pipeline, and this page will expose it honestly once it is wired as a working option.