|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: