diff --git a/html/css/custom/styles.css b/html/css/custom/styles.css
index 27ee8f102eb56687a29043c550fdda78a23d6ef1..d1f1568b5788c4b2a7c3fbc10312c0dce340a3e8 100644
--- a/html/css/custom/styles.css
+++ b/html/css/custom/styles.css
@@ -743,6 +743,12 @@ legend {
      background-color:#000;
 }
 
+/* tool tip MAP */
+
+div.vis-tooltip {
+    color: #fff;
+    background-color: #333;
+}
 
 /* FOOTER */