From 9f2706d2907a9621d6ac75320e9c992123e90299 Mon Sep 17 00:00:00 2001
From: Charles Lehnert <charles.lehnert@pslgroup.com>
Date: Tue, 23 Apr 2019 17:40:24 -0400
Subject: [PATCH] Check for color knob value existence before applying
 uppercase

---
 addons/knobs/src/components/types/Color.js | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/addons/knobs/src/components/types/Color.js b/addons/knobs/src/components/types/Color.js
index 5923015f3852..1b440d615616 100644
--- a/addons/knobs/src/components/types/Color.js
+++ b/addons/knobs/src/components/types/Color.js
@@ -82,7 +82,6 @@ class ColorType extends React.Component {
     const colorStyle = {
       background: knob.value,
     };
-
     return (
       <ColorButton
         active={displayColorPicker}
@@ -91,7 +90,7 @@ class ColorType extends React.Component {
         onClick={this.handleClick}
         size="flex"
       >
-        {knob.value.toUpperCase()}
+        {knob.value && knob.value.toUpperCase()}
         <Swatch style={colorStyle} />
         {displayColorPicker ? (
           <Popover