diff --git a/static/grenoble/_vars.scss b/static/grenoble/_vars.scss
index 1fecea7c..401cc77e 100644
--- a/static/grenoble/_vars.scss
+++ b/static/grenoble/_vars.scss
@@ -1,2 +1,6 @@
 $primary-color: #175F83;
+
+$button-background: $primary-color;
+$button-color: white;
+
 @import '../izi-ici/vars';