You easily switch between Light and Dark themes (independent of your OS mode) by selecting View menu > Theme.
Alternatively, you can add our new "Theme" button to the Postbox toolbar by right-clicking the toolbar and selecting "Customize..." from the pop-up menu. Then drag and drop the "Theme" icon to the desired location in your toolbar.
The "Theme" toolbar button will allow you to switch modes with a single click. A press-and-hold action on the Theme button will allow you to select from Light, Dark, or Default to follow the OS setting (where supported).
- The theme colors are not user customizable.
- The team experimented a great deal with black vs. white background colors for both the message preview and composition areas and decided to keep them white for the time being.
On the preview side, we've found huge differences in how messages display. In short, we found that far too many messages weren't properly formatted or authored, which caused them to appear broken with dark backgrounds. Additionally, many messages force a white background, which creates a jarring experience as you page through messages with some backgrounds white, and some dark.
On the message composition side, we'll have a bit more flexibility to change things, but we would like to receive more feedback from customers before we make any changes.
- As with any new theme release, the Postbox team will be anxious to hear your feedback. If you have ideas on how the theme should be tuned, please submit a Feature Request.