diff --git a/css/duplicate-subjects.css b/css/duplicate-subjects.css
index 94c5864..f2e6cfe 100644
--- a/css/duplicate-subjects.css
+++ b/css/duplicate-subjects.css
@@ -14,7 +14,7 @@
     margin: 15px 10px;
     border-bottom-left-radius: 0px;
     margin-left: -2px;
-    border-left: 3px solid "#4A4A4A";
+    border-left: 3px solid black;
 }
 
 .buttons.grid .complex-button2Left {
@@ -22,5 +22,5 @@
     margin: 15px 10px;
     margin-right: -2px;
     border-bottom-right-radius: 0px;
-    border-right: 3px solid "#4A4A4A";
+    border-right: 3px solid black;
 }