diff --git a/content/labs/visualization/2020-06-13-different-types-of-graphs.md b/content/labs/visualization/2020-06-13-different-types-of-graphs.md
index 4130747..0d422c5 100644
--- a/content/labs/visualization/2020-06-13-different-types-of-graphs.md
+++ b/content/labs/visualization/2020-06-13-different-types-of-graphs.md
@@ -85,6 +85,14 @@ chart=true
         datasets: [{
             label: '# of Votes',
             data: [12, 19, 3, 5, 2, 3],
+            backgroundColor: [
+                'rgba(0,0,0,0)',
+                'rgba(0,0,0,0)',
+                'rgba(0,0,0,0)',
+                'rgba(0,0,0,0)',
+                'rgba(0,0,0,0)',
+                'rgba(0,0,0,0)'
+            },
             borderColor: [
                 'rgba(255, 99, 132, 1)',
                 'rgba(54, 162, 235, 1)',