color-scheme meta tag
Changes the default colors of HTML elements. Useful for when you want an email to display only in a dark color scheme or only a light scheme, regardless of user settings. Equivalent to setting the color-scheme CSS property on the root element
Outlook
Windows
2003
2007
2010
2013
2016
2019
Windows Mail
2023-09
macOS
2023
16.80
Outlook.com
2023-09
2024-01
iOS
2023-09
Android
2023-09
Samsung Email
Android
9.1
Mozilla Thunderbird
macOS
102.11
Fastmail
Desktop Webmail
2023-09
HEY
Desktop Webmail
2023-09
LaPoste.net
Desktop Webmail
2021-08
1&1
Desktop Webmail
2022-11
Android
2022-11
Mail.ru
Desktop Webmail
2023-09
WP.pl
Desktop Webmail
2025-09