Stack js some padding between outside border

I would like to add some padding to the border on the outside of my chart, see attached image of expected outcome.

as you can see i have a border width of 1, but its sitting on the chart, i would like it like the above image.

 chart.data.datasets.pop();
    chart.data.datasets.push({

      data: [mr_results_total, ea_results_total, rav_results_total],
      backgroundColor: [
        'rgb(255, 99, 132)',
        'rgb(54, 162, 235)',
        'rgb(255, 205, 86)'
      ],
      borderColor: ['#CBE1EF','','',''],
      borderWidth: 1,
    });