Dark mode and email delivery – Make it work today Recently Yahoo announced support for dark mode on mobile app. But when user opens the email, the background is still white and hence irritating for users. Other email providers have also developed dark mode for their mobile users. Some email inboxes automatically adjust the email content to be compatible with dark mode by inverting colors. Some inboxes only change the UI without affecting the email content. Know this! If your emails are not compatible with dark mode, the user might get irritated on looking at light rendering and might close the email or unsubscribe. Do this today: Send plain text emails without pictures If you want to create emails with pictures, then create dark mode friendly emails. Test emails in different inboxes and in dark/light mode To all pictures and logos, use transparent background and a translucent outline You can also add your own dark mode style on CSS: @media (prefers-color-scheme: dark) Note: dark mode is only a small factor on determining email deliverability.