diff --git a/app/javascript/controllers/sankey_chart_controller.js b/app/javascript/controllers/sankey_chart_controller.js
index 1af8a25a8..cb24edeb9 100644
--- a/app/javascript/controllers/sankey_chart_controller.js
+++ b/app/javascript/controllers/sankey_chart_controller.js
@@ -511,7 +511,7 @@ export default class extends Controller {
       .append("div")
       .attr(
         "class",
-        "bg-gray-700 text-white text-sm p-2 rounded pointer-events-none absolute z-50 top-0",
+        "bg-container text-primary text-sm font-sans p-2 border border-secondary rounded-lg pointer-events-none absolute z-50 top-0 privacy-sensitive",
       )
       .style("opacity", 0)
       .style("pointer-events", "none");