diff --git a/guacamole/src/main/webapp/styles/ui.css b/guacamole/src/main/webapp/styles/ui.css
index 161b10099..b7f15503e 100644
--- a/guacamole/src/main/webapp/styles/ui.css
+++ b/guacamole/src/main/webapp/styles/ui.css
@@ -250,7 +250,7 @@ div.section {
     vertical-align: top;
     z-index: 1;
 
-    border: 1px solid rgba(0, 0, 0, 0.1);
+    border: 1px solid rgba(0, 0, 0, 0.5);
     background: #DDD;
     padding: 0.5em;
     margin: 0.25em;