diff --git a/src/index.css b/src/index.css
index bf4268c..1495736 100644
--- a/src/index.css
+++ b/src/index.css
@@ -10,6 +10,7 @@ html {
   --popup-header: #ccc;
   --primary-color: #3f79ad;
   --secondary-color: #71caf2;
+  --tertiary-color: #b4e3f9;
   --primary-color-trans: #3f79ad33;
   --secondary-color-trans: #71caf233;
   --text-color: #000;