Dark mode in email clients New in 0.11

Every design tells email clients it supports both light and dark mode. For designs with a light background, LatestArr works out a matching dark palette from your colours, so a custom palette gets a sensible dark version without extra work.

Support by client

Apple Mail and similar clients switch to the dark palette when the device is in dark mode.
Outlook.com uses its own dark-mode hooks, which LatestArr also targets.
Clients that strip backgrounds (Thunderbird’s dark view, for example) still show the type badges, which have a thin border for exactly this reason.
If your design’s background is already dark, LatestArr just declares support and leaves your colours alone.

⚠️

Gmail’s mobile apps apply their own dark mode and ignore these styles, so results there vary. There’s nothing a sender can do about that today.

In code designs

Code mode starts you with a one-line  comment in the head. It’s replaced with the design’s dark-mode styles when the email is sent. Keep that line to keep dark mode; delete it to turn dark mode off.