> For the complete documentation index, see [llms.txt](https://docs.subscripta.app/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.subscripta.app/troubleshooting/gmail-ios-dark-mode-protection.md).

# How the Gmail iOS dark-mode protection works

The Copy HTML export includes scoped protection around white identity text on dark header backgrounds. It keeps the text as real HTML while adding the nested blend-mode wrappers used by the known Gmail iOS workaround.

## How It Works

1. The dark header cell keeps a fallback background color and a linear-gradient background image.
2. Only locked white identity text is wrapped.
3. The wrapper uses `mix-blend-mode:screen` and `mix-blend-mode:difference`.
4. Contact rows are left unchanged because they already behave correctly.

## Use This for Webmail

This is the best option when sending from Roundcube, Gmail web, or another webmail client that preserves the exported HTML.

## When Not to Use It

Use the Email Clients export instead when a desktop email app strips or rewrites advanced CSS. If a client removes only part of the blend-mode workaround, it can create visible artifacts.


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