diff --git a/source/_static/custom.css b/source/_static/custom.css
index 807bb6d..4e84adb 100644
--- a/source/_static/custom.css
+++ b/source/_static/custom.css
@@ -22,3 +22,11 @@
     font-style: italic;
     margin-bottom: 10px;
 }
+
+.wy-nav-side {
+    background-color: #0fbbbb;
+}
+
+.wy-menu-vertical {
+    color: #0fbbbb;
+}
\ No newline at end of file