diff --git a/ghost/admin/assets/sass/patterns/global.scss b/ghost/admin/assets/sass/patterns/global.scss
index 7ca1789ab2..1e2e35ca44 100644
--- a/ghost/admin/assets/sass/patterns/global.scss
+++ b/ghost/admin/assets/sass/patterns/global.scss
@@ -101,7 +101,7 @@ ul ol, ol ul {
 }
 
 mark {
-    background-color: #ffc336;
+    background-color: #fdffb6;
 }
 
 a {
diff --git a/ghost/admin/helpers/gh-format-markdown.js b/ghost/admin/helpers/gh-format-markdown.js
index 69be7fc13d..03dabc2f8d 100644
--- a/ghost/admin/helpers/gh-format-markdown.js
+++ b/ghost/admin/helpers/gh-format-markdown.js
@@ -4,7 +4,7 @@ import cajaSanitizers from 'ghost/utils/caja-sanitizers';
 var showdown,
     formatMarkdown;
 
-showdown = new Showdown.converter({extensions: ['ghostimagepreview', 'ghostgfm', 'footnotes']});
+showdown = new Showdown.converter({extensions: ['ghostimagepreview', 'ghostgfm', 'footnotes', 'highlight']});
 
 formatMarkdown = Ember.Handlebars.makeBoundHelper(function (markdown) {
     var escapedhtml = '';