diff --git a/src/librustdoc/html/static/themes/ayu.css b/src/librustdoc/html/static/themes/ayu.css
index 1326acec51ce1..24c9472bd8c9f 100644
--- a/src/librustdoc/html/static/themes/ayu.css
+++ b/src/librustdoc/html/static/themes/ayu.css
@@ -61,6 +61,10 @@ pre {
 	background-color: #14191f;
 }
 
+.logo-container > img {
+	filter: drop-shadow(0 0 5px #fff);
+}
+
 /* Improve the scrollbar display on firefox */
 * {
 	scrollbar-color: #5c6773 transparent;
diff --git a/src/librustdoc/html/static/themes/dark.css b/src/librustdoc/html/static/themes/dark.css
index dc15220aa0690..6c7fcd1df7b42 100644
--- a/src/librustdoc/html/static/themes/dark.css
+++ b/src/librustdoc/html/static/themes/dark.css
@@ -32,6 +32,10 @@ pre {
 	background-color: #505050;
 }
 
+.logo-container > img {
+	filter: drop-shadow(0 0 5px #fff);
+}
+
 /* Improve the scrollbar display on firefox */
 * {
 	scrollbar-color: rgb(64, 65, 67) #717171;
diff --git a/src/librustdoc/html/static/themes/light.css b/src/librustdoc/html/static/themes/light.css
index 64d59ca411a87..c1e5bad639bf6 100644
--- a/src/librustdoc/html/static/themes/light.css
+++ b/src/librustdoc/html/static/themes/light.css
@@ -43,6 +43,10 @@ pre {
 	scrollbar-color: rgba(36, 37, 39, 0.6) #d9d9d9;
 }
 
+.logo-container > img {
+	filter: drop-shadow(0 0 5px #aaa);
+}
+
 /* Improve the scrollbar display on webkit-based browsers */
 ::-webkit-scrollbar-track {
 	background-color: #ecebeb;