diff --git a/src/pages/overall/overall-course/overall-course.scss b/src/pages/overall/overall-course/overall-course.scss
index f812224..28ce193 100644
--- a/src/pages/overall/overall-course/overall-course.scss
+++ b/src/pages/overall/overall-course/overall-course.scss
@@ -57,8 +57,19 @@
             display: inline-block;
             width: 20px;
             text-align: center;
-
             border-radius: 5px;
+
+            .none
+            {
+                background: #eeeeee;
+                color: #999999;
+            }
+
+            .unread
+            {
+                background: #ff6c00;
+                color: white;
+            }
         }
 
     }