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Outlook: dark mode contrast tuning

Deepens the dark-mode background and softens message text contrast for easier evening reading.

Code to copy

/* Tune dark mode: deeper background and softer text contrast */
html[data-theme="dark"] body,
body[class*="dark"] {
  background: #16181c !important;
}
html[data-theme="dark"] div[aria-label="Message body"] {
  color: #d6d6d6 !important;
}

How to use this example

1. Copy the code with the button above.
2. Install JustZix (2 minutes) and open the extension on the target page.
3. Add a new rule matching that page.
4. Paste the code into the rule's CSS panel and save — the effect appears instantly.