Optimise Email Signatures with Transparent Images for Dark Mode

With many users adopting dark mode in the new Microsoft Outlook, including a transparent background for images such as logos or signatures ensures your emails look professional across both light and dark themes.

Why It Matters

  • Many users enable dark mode, which displays emails on a black or dark coloured background.
  • Images with a white background appear as distracting blocks against the dark background, disrupting the email’s appearance.
  • Transparent images seamlessly adapt to both light and dark modes, maintaining a polished look.

Here’s how to Use Transparent Background Images

To create a transparent image:

  • Use a design tool, for example Photoshop, Canva, or a free online editor to remove the background from your image.
  • Save the file as a PNG format to preserve transparency.

Add the transparent image to your email signature:

  • Open Outlook and go to Settings > View all Outlook settings > Mail > Compose and reply.
  • Under the email signature section, upload the transparent PNG image and adjust its placement.

Test Your Email in Dark Mode

  • Send yourself a test email
  • View it in both light and dark modes to ensure the image displays correctly.

 

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