diff --git a/themes/intotheeast/css/style.css b/themes/intotheeast/css/style.css
index d340c8e..e0dbfd5 100644
--- a/themes/intotheeast/css/style.css
+++ b/themes/intotheeast/css/style.css
@@ -368,6 +368,9 @@ body::after {
     width: 100%;
 }
 
+/* match CartoDB dark tile background so no grey flash on load/zoom */
+.leaflet-container { background: #1a1a2e; }
+
 .map-empty {
     display: flex;
     align-items: center;