diff --git a/templates/html/email-styles.php b/templates/html/email-styles.php
index 450345c3bd79b06c6a410f893ab9998496d9c496..2fae35bd616851f16ea1ebf68ec8d228de5ff00c 100644
--- a/templates/html/email-styles.php
+++ b/templates/html/email-styles.php
@@ -9,11 +9,11 @@ if ( ! defined( 'ABSPATH' ) ) {
 }
 
 // Load colors.
-$bg        = $params['bg'];
-$body      = $params['body'];
-$base      = $params['primary'];
+$bg        = $params['bg'] ?? '#f8f8f8';
+$body      = $params['body'] ?? '#ffffff';
+$base      = $params['primary'] ?? '#5c9a2c';
 $base_text = Template::light_or_dark( $base, '#171717', '#ffffff' );
-$text      = $params['text'];
+$text      = $params['text'] ?? '#33333';
 
 // Pick a contrasting color for links.
 $link_color = Template::is_hex_light( $base ) ? $base : $base_text;