Dark Mode Support for HTML Emails
Adds the color-scheme meta tags to HTML emails, so mail apps like Apple Mail and Outlook render them properly in dark mode instead of inverting your colors badly.
Opens WPIDE on
Code
add_filter( 'wp_mail', function ( $atts ) {
$message = (string) $atts['message'];
if ( false === stripos( $message, '<head' ) || false !== stripos( $message, 'color-scheme' ) ) {
return $atts;
}
$meta = '<meta name="color-scheme" content="light dark"><meta name="supported-color-schemes" content="light dark">';
$atts['message'] = preg_replace( '/<head([^>]*)>/i', '<head$1>' . $meta, $message, 1 );
return $atts;
}, 50 );Notes
Only changes emails that already contain an HTML head; your template should also look fine on dark backgrounds.
How to add this snippet
- Install WPIDE on your WordPress site (it is free) and open Code Snippets.
- Use snippet above adds it from the library in one click. Or copy the code into a new snippet with the same code type.
- It is added inactive: review the code and settings, then switch it on.