diff --git a/src/unified_graphics/static/js/component/ChartTimeSeries.js b/src/unified_graphics/static/js/component/ChartTimeSeries.js
index 2f087f18..1b49f62e 100644
--- a/src/unified_graphics/static/js/component/ChartTimeSeries.js
+++ b/src/unified_graphics/static/js/component/ChartTimeSeries.js
@@ -54,7 +54,7 @@ export default class ChartTimeSeries extends ChartElement {
   }
 
   #iqr {
-    fill: #dfe1e2;
+    fill: #a9aeb1;
   }
 
   #current,