diff --git a/frontend/src/components/ChartCard.vue b/frontend/src/components/ChartCard.vue
index 0b86910..6208423 100644
--- a/frontend/src/components/ChartCard.vue
+++ b/frontend/src/components/ChartCard.vue
@@ -10,7 +10,7 @@ export default {
   data: () => ({
     ws: null,
     chart: null,
-    indexColor: 0,
+    indexColor: -1,
     lineColors: {
       light: [
         colors.red.lighten1,