Chart.js – Styling Legend

Chart.defaults.global.legend.labels.usePointStyle = true;

var ctx = document.getElementById("myChart").getContext("2d");
var myChart = new Chart(ctx, {
    type: 'line',
    data: {
        labels: ["Red", "Blue", "Yellow", "Green", "Purple", "Orange"],
        datasets: [{
            label: 'Link One',
            data: [1, 2, 3, 2, 1, 1.5, 1],
            backgroundColor: [
                '#D3E4F3'
            ],
            borderColor: [
                '#D3E4F3',
                'rgba(54, 162, 235, 1)',
                'rgba(255, 206, 86, 1)',
                'rgba(75, 192, 192, 1)',
                'rgba(153, 102, 255, 1)',
                'rgba(255, 159, 64, 1)'
            ],
            borderWidth: 1
        }]
    },
    options: {
        legend: {
            display: true,
            position: 'bottom',
            labels: {
                fontColor: '#333'
            }
        }
    }
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.5.0/Chart.min.js"></script>
<div class="container">
  <canvas id="myChart"></canvas>
</div>