diff --git a/src/librustdoc/html/static/themes/ayu.css b/src/librustdoc/html/static/themes/ayu.css
index 96ba5c46a3cd..4c0ff4e78426 100644
--- a/src/librustdoc/html/static/themes/ayu.css
+++ b/src/librustdoc/html/static/themes/ayu.css
@@ -62,6 +62,10 @@ 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 33c0f885fa95..ebc8476f3b14 100644
--- a/src/librustdoc/html/static/themes/dark.css
+++ b/src/librustdoc/html/static/themes/dark.css
@@ -34,6 +34,10 @@ 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 569ce7da2091..848424dd1c3f 100644
--- a/src/librustdoc/html/static/themes/light.css
+++ b/src/librustdoc/html/static/themes/light.css
@@ -45,6 +45,10 @@ 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;