diff --git a/godoc/static/static.go b/godoc/static/static.go
index 642635bf..b8b9ef5f 100644
--- a/godoc/static/static.go
+++ b/godoc/static/static.go
@@ -2698,6 +2698,7 @@ function PlaygroundOutput(el) {
 	margin: 0;
 	font-family: Helvetica, Arial, sans-serif;
 	font-size: 16px;
+	background-color: #fff;
 }
 pre,
 code {
diff --git a/godoc/static/style.css b/godoc/static/style.css
index dd417a24..ff4b7032 100644
--- a/godoc/static/style.css
+++ b/godoc/static/style.css
@@ -2,6 +2,7 @@ body {
 	margin: 0;
 	font-family: Helvetica, Arial, sans-serif;
 	font-size: 16px;
+	background-color: #fff;
 }
 pre,
 code {