diff --git a/src/librustdoc/html/static/css/themes/ayu.css b/src/librustdoc/html/static/css/themes/ayu.css
index 13e8dc85a24..2655ea3ccd1 100644
--- a/src/librustdoc/html/static/css/themes/ayu.css
+++ b/src/librustdoc/html/static/css/themes/ayu.css
@@ -97,7 +97,7 @@ pre, .rustdoc.source .example-wrap {
 }
 
 .source .sidebar {
-	background-color: #0f1419;
+	background-color: #14191f;
 }
 
 .sidebar .location {
diff --git a/src/librustdoc/html/static/css/themes/dark.css b/src/librustdoc/html/static/css/themes/dark.css
index 3e5ec748397..b125207c390 100644
--- a/src/librustdoc/html/static/css/themes/dark.css
+++ b/src/librustdoc/html/static/css/themes/dark.css
@@ -66,7 +66,7 @@ pre, .rustdoc.source .example-wrap {
 }
 
 .source .sidebar {
-    background-color: #565656;
+	background-color: #565656;
 }
 
 .sidebar .location {
diff --git a/src/librustdoc/html/static/css/themes/light.css b/src/librustdoc/html/static/css/themes/light.css
index fec71674e63..898ae98ddd0 100644
--- a/src/librustdoc/html/static/css/themes/light.css
+++ b/src/librustdoc/html/static/css/themes/light.css
@@ -66,7 +66,7 @@ pre, .rustdoc.source .example-wrap {
 }
 
 .source .sidebar {
-	background-color: #fff;
+	background-color: #f1f1f1;
 }
 
 .sidebar .location {