diff --git a/app/assets/javascripts/02-editor.js b/app/assets/javascripts/02-editor.js
index e552a86e..2ad0aa14 100644
--- a/app/assets/javascripts/02-editor.js
+++ b/app/assets/javascripts/02-editor.js
@@ -344,6 +344,8 @@ function cleanNode (node, contentEl) {
 				const value = child.style[style]
 
 				switch (style) {
+          case 'background-color':
+            if (child.tagName === "MARK") break
 					default:
 						child.style[style] = ""
 				}