diff --git a/grade/report/grader/lib.php b/grade/report/grader/lib.php
index f1dd17ebb50..c99f6727d5d 100644
--- a/grade/report/grader/lib.php
+++ b/grade/report/grader/lib.php
@@ -857,7 +857,7 @@ class grade_report_grader extends grade_report {
                     $itemcell->attributes['class'] = $type . ' ' . $catlevel . ' highlightable';
 
                     if ($element['object']->is_hidden()) {
-                        $itemcell->attributes['class'] .= ' hidden';
+                        $itemcell->attributes['class'] .= ' dimmed_text';
                     }
 
                     $itemcell->colspan = $colspan;
diff --git a/grade/report/grader/styles.css b/grade/report/grader/styles.css
index e5c83800595..32d12f183f8 100644
--- a/grade/report/grader/styles.css
+++ b/grade/report/grader/styles.css
@@ -201,11 +201,6 @@ margin-left: 10px;
 text-align:right;
 }
 
-table#user-grades .hidden,
-table#user-grades .hidden a {
-color:#aaa;
-}
-
 table#user-grades .datesubmitted {
 font-size:.7em;
 }
diff --git a/theme/mymobile/style/core.css b/theme/mymobile/style/core.css
index 70ab956c7b2..3f6fba0416b 100644
--- a/theme/mymobile/style/core.css
+++ b/theme/mymobile/style/core.css
@@ -927,6 +927,10 @@ table#user-grades {
     border-width: 0px;
     font-size: inherit;
 }
+table#user-grades .dimmed_text,
+table#user-grades .dimmed_text a {
+    color: #AAAAAA;
+}
 table.user-grade td.oddd1.b1t.b2b.b1l{
     width: 0px;
 }