darkened label borders to match design

Change-Id: Ib6c5089644a4cf7b56cd5e09934e34f60c2532cc
Signed-off-by: Michael Davis <michael.s.davis@ibm.com>
diff --git a/app/login/styles/index.scss b/app/login/styles/index.scss
index 2d49dec..3d4ebeb 100644
--- a/app/login/styles/index.scss
+++ b/app/login/styles/index.scss
@@ -83,7 +83,7 @@
   }
   li {
     padding: 1em 0;
-    border-top: 1px solid $lightgrey;
+    border-top: 1px solid $medgrey;
   }
   p {
     margin-bottom: 0;