diff --git a/assets/scss/_custom.scss b/assets/scss/_custom.scss
index 752af266cb..20a36b6175 100644
--- a/assets/scss/_custom.scss
+++ b/assets/scss/_custom.scss
@@ -338,11 +338,15 @@ main {
     border-left-color: #d9534f;
   }
 
+
   h1:first-of-type + blockquote.callout {
     margin-top: 1.5em;
   }
 }
 
+// Special color for third party content disclaimers
+.alert.third-party-content { border-left-color: #222 };
+
 // Highlight disclaimer when targeted as a fragment
 
 #third-party-content-disclaimer {