Pie with monochrome fill

author(s): Torstein Hønsi

by valk

HTML

<script src="https://code.highcharts.com/highcharts.js"></script>
<script src="https://code.highcharts.com/modules/exporting.js"></script>
<script src="https://code.highcharts.com/modules/export-data.js"></script>
<script src="https://code.highcharts.com/modules/accessibility.js"></script>

<figure class="highcharts-figure">
    <div id="container"></div>
    <p class="highcharts-description">
        Pie chart demonstrating a monochrome color scheme. Monochrome color
        schemes can make certain charts easier to understand, as it helps
        readers to focus on the content instead of the colors. There can also
        be accessibility benefits to using this kind of color scheme, both fo
        color blindness and tactile mediums, as long as there is a clear
        separation between slices.
    </p>
</figure>

CSS

.highcharts-figure, .highcharts-data-table table {
    min-width: 320px; 
    max-width: 660px;
    margin: 1em auto;
}

.highcharts-data-table table {
	font-family: Verdana, sans-serif;
	border-collapse: collapse;
	border: 1px solid #EBEBEB;
	margin: 10px auto;
	text-align: center;
	width: 100%;
	max-width: 500px;
}
.highcharts-data-table caption {
    padding: 1em 0;
    font-size: 1.2em;
    color: #555;
}
.highcharts-data-table th {
	font-weight: 600;
    padding: 0.5em;
}
.highcharts-data-table td, .highcharts-data-table th, .highcharts-data-table caption {
    padding: 0.5em;
}
.highcharts-data-table thead tr, .highcharts-data-table tr:nth-child(even) {
    background: #f8f8f8;
}
.highcharts-data-table tr:hover {
    background: #f1f7ff;
}

JavaScript

// Make monochrome colors
var pieColors = (function () {
    var colors = [],
        base = Highcharts.getOptions().colors[0],
        i;

    for (i = 0; i < 10; i += 1) {
        // Start out with a darkened base color (negative brighten), and end
        // up with a much brighter color
        colors.push(Highcharts.color(base).brighten((i - 3) / 7).get());
    }
    return colors;
}());

// Build the chart
Highcharts.chart('container', {
    chart: {
        plotBackgroundColor: null,
        plotBorderWidth: null,
        plotShadow: false,
        type: 'pie'
    },
    title: {
        text: 'Browser market shares at a specific website, 2014'
    },
    tooltip: {
        pointFormat: '{series.name}: <b>{point.percentage:.1f}%</b>'
    },
    accessibility: {
        point: {
            valueSuffix: '%'
        }
    },
    plotOptions: {
        pie: {
            allowPointSelect: true,
            cursor: 'pointer',
            colors: pieColors,
            dataLabels: {
                enabled: true,
                format: '<b>{point.name}</b><br>{point.percentage:.1f} %',
                distance: 0,
                filter: {
                    property: 'percentage',
                    operator: '>',
                    value: 4
                }
            }
        }
    },
    series: [{
        name: 'Share',
        data: [
            { name: 'Chrome', y: 61.41 },
            { name: 'Internet Explorer', y: 11.84 },
            { name: 'Firefox', y: 10.85 },
            { name: 'Edge', y: 4.67 },
            { name: 'Safari', y: 4.18 },
            { name: 'Other', y: 7.05 }
        ]
    }]
});