diff --git a/common/app/routes/Challenges/challenges.less b/common/app/routes/Challenges/challenges.less
index 09c19aed65..d42415689a 100644
--- a/common/app/routes/Challenges/challenges.less
+++ b/common/app/routes/Challenges/challenges.less
@@ -215,7 +215,6 @@
 .@{ns}-preview {
   .max-element-height();
   width: 100%;
-  background-color: @silver-chalice;
 }
 
 .@{ns}-preview-frame {