Pie with monochrome fill

author(s): Torstein Hønsi

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

body {
    font-family:
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        Roboto,
        Helvetica,
        Arial,
        "Apple Color Emoji",
        "Segoe UI Emoji",
        "Segoe UI Symbol",
        sans-serif;
    background: var(--highcharts-background-color);
    color: var(--highcharts-neutral-color-100);
}

.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 var(--highcharts-neutral-color-10, #e6e6e6);
    margin: 10px auto;
    text-align: center;
    width: 100%;
    max-width: 500px;
}

.highcharts-data-table caption {
    padding: 1em 0;
    font-size: 1.2em;
    color: var(--highcharts-neutral-color-60, #666);
}

.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 tbody tr:nth-child(even) {
    background: var(--highcharts-neutral-color-3, #f7f7f7);
}

.highcharts-description {
    background: light-dark(#f2f6f2, #323232);
    border-radius: 0 4px 4px 0;
    border-left: 2px solid light-dark(#1d6aff, #fff);
    font-size: 0.8rem;
    font-style: italic;
    padding: 8px 16px;
    margin: 2em 10px 1em;
}

JavaScript

// Data retrieved from https://netmarketshare.com/
// Make monochrome colors
const colors = Highcharts.getOptions().colors.map((c, i) =>
    // Start out with a darkened base color (negative brighten), and end
    // up with a much brighter color
    Highcharts.color(Highcharts.getOptions().colors[0])
        .brighten((i - 3) / 7)
        .get()
);

// Build the chart
Highcharts.chart('container', {
    chart: {
        plotBackgroundColor: null,
        plotBorderWidth: null,
        plotShadow: false,
        type: 'pie'
    },
    title: {
        text: 'Browser market shares in February, 2022'
    },
    tooltip: {
        pointFormat: '{series.name}: <b>{point.percentage:.1f}%</b>'
    },
    accessibility: {
        point: {
            valueSuffix: '%'
        }
    },
    plotOptions: {
        pie: {
            allowPointSelect: true,
            cursor: 'pointer',
            colors,
            borderRadius: 5,
            dataLabels: {
                enabled: true,
                format: '<b>{point.name}</b><br>{point.percentage:.1f} %',
                distance: -50,
                filter: {
                    property: 'percentage',
                    operator: '>',
                    value: 4
                }
            }
        }
    },
    series: [{
        name: 'Share',
        data: [
            { name: 'Chrome', y: 74.03 },
            { name: 'Edge', y: 12.66 },
            { name: 'Firefox', y: 4.96 },
            { name: 'Safari', y: 2.49 },
            { name: 'Internet Explorer', y: 2.31 },
            { name: 'Other', y: 3.398 }
        ]
    }]
});