title: ChartJS update data with a colour
body: <p>Evening all, I have a function to update the data in my ChartJS chart, however it will always update with a solid blue colour, I also have a function to get a random rgba colour however I am having trouble mating the two, code below and any help would be appreciated!</p>
  <pre><code>function updateData() {
      removeData(bubbleChart);
      bubbleChart.data.labels.push(&quot;Test&quot;,&quot;test 2&quot;,);
      bubbleChart.data.datasets.forEach((dataset) =&gt; {
          dataset.data.push([45111.00,61.97,10],[1421413.00,236.55,10],);
      });
      bubbleChart.data.backgroundColor.push(randomColor())
      bubbleChart.update();
  }
  </code></pre>
  <p>I get the following error:</p>
  <blockquote>
  <p>TypeError: undefined is not an object (evaluating 'bubbleChart.backgroundColor.push')</p>
  </blockquote>