From d595f8eaa891a25b2246df849e21e1a2175d2b16 Mon Sep 17 00:00:00 2001
From: Alex P <thealexpaxton@gmail.com>
Date: Fri, 8 Dec 2017 14:39:40 -0800
Subject: [PATCH] Prevent addition of thresholds with a nonexistent color

---
 ui/src/dashboards/components/CellEditorOverlay.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ui/src/dashboards/components/CellEditorOverlay.js b/ui/src/dashboards/components/CellEditorOverlay.js
index da51bc3464..352c1c61ad 100644
--- a/ui/src/dashboards/components/CellEditorOverlay.js
+++ b/ui/src/dashboards/components/CellEditorOverlay.js
@@ -79,7 +79,7 @@ class CellEditorOverlay extends Component {
     const sortedColors = _.sortBy(colors, color => Number(color.value))
 
     if (sortedColors.length <= MAX_THRESHOLDS) {
-      const randomColor = _.random(0, GAUGE_COLORS.length)
+      const randomColor = _.random(0, GAUGE_COLORS.length - 1)
 
       const maxValue =
         cellWorkingType === 'gauge'