Dark mode is a display setting for user interfaces such as smartphones or laptops.
When a device is in dark mode, content is presented as light text (white or grey) on dark backgrounds, instead of the default dark text (called "light mode") on light backgrounds.
Dark mode was introduced to reduce exposure to blue light and help prevent eye strain from screen time.
Can I control how my emails display to devices using dark mode?
There are a small number of apps and devices (Apple Mail, iPhone, iPad) that support code to enable content to switch, from light or dark, when either mode is enabled in the app.
All other apps and devices will automatically perform either a full or partial colour invert on the client-side, which cannot be halted or changed by applying code to your templates.
How apps and devices currently handle light/dark mode
|App/device||Light/dark mode handling|
Whether the app is in light mode or dark mode your email doesn’t change unless code has been added to the template to enable this to happen.
Changes will only be controlled by the code in your templates when light/dark mode is applied.
|Gmail Android app||
Apps only automatically detect light backgrounds and dark text.
These are inverted into dark backgrounds and white text.
Dark backgrounds will remain as is.
Changes cannot be halted/affected by applying code to your templates.
|Outlook Android app|
|Outlook iOS app|
|Outlook 2019 for macOS|
|Gmail iOS app||
Apps automatically detect both light and dark backgrounds and text.
These are inverted from light into dark and dark into light.
Changes cannot be halted/changed by applying code to your templates
|Outlook 2019 for Windows|
If you'd like to know more, these email industry articles go into more granular detail: