diff --git a/core/core-frontend/src/views/chart/components/editor/util/chart.ts b/core/core-frontend/src/views/chart/components/editor/util/chart.ts
index 3164b7b393..35cc74eac1 100644
--- a/core/core-frontend/src/views/chart/components/editor/util/chart.ts
+++ b/core/core-frontend/src/views/chart/components/editor/util/chart.ts
@@ -116,7 +116,7 @@ export const DEFAULT_COLOR_CASE_DARK: DeepPartial<ChartAttr> = {
     alpha: 100,
     gradient: false,
     mapStyle: 'darkblue',
-    areaBaseColor: '5470C6',
+    areaBaseColor: '#5470C6',
     areaBorderColor: '#EBEEF5',
     gaugeStyle: 'default',
     tableBorderColor: '#CCCCCC',