Dark mode (prefers-color-scheme)

author(s): Torstein Hønsi

by maritavindedal

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/accessibility.js"></script>

<figure class="highcharts-figure">
    <div id="container"></div>

    <div class="highcharts-description">
        This demo uses a tri-state theme selector, where the "Light" option
        applies default colors, and the "Dark" option applies CSS variables for
        dark colors. The "System default" option applies those color variables
        only if <a href="https://developer.mozilla.org/en-US/docs/Web/CSS/@media/prefers-color-scheme">
        prefers-color-scheme</a> is <code>dark</code>.
    </div>

    <div class="controls">
        <h4>Color theme</h4>
        <label>
            <input type="radio" name="color-mode" value="none" checked>
            System default
        </label>
        <label>
            <input type="radio" name="color-mode" value="light">
            Light
        </label>
        <label>
            <input type="radio" name="color-mode" value="dark">
            Dark
        </label>
    </div>
</figure>

CSS

@import url("https://code.highcharts.com/css/highcharts.css");

.highcharts-figure {
    max-width: 800px;
    min-width: 360px;
    margin: 0 auto;
}

.highcharts-background {
    transition: all 250ms;
}

.highcharts-description {
    margin: 10px;
}

.controls {
    margin: 10px;
}

@media (prefers-color-scheme: dark) {
    :root {
        /* Colors for data series and points */
        --highcharts-color-0: #b3597c;
        --highcharts-color-1: #c4688c;
        --highcharts-color-2: #78a8d1;
        --highcharts-color-3: #7991d2;
        --highcharts-color-4: #7d7bd4;
        --highcharts-color-5: #977dd5;
        --highcharts-color-6: #b3597c;
        --highcharts-color-7: #b27fd6;

        /* UI colors */
        --highcharts-background-color: #333;

        /*
            Neutral color variations
            https://www.highcharts.com/samples/highcharts/css/palette-helper
        */
        --highcharts-neutral-color-100: rgb(255, 255, 255);
        --highcharts-neutral-color-80: rgb(214, 214, 214);
        --highcharts-neutral-color-60: rgb(173, 173, 173);
        --highcharts-neutral-color-40: rgb(133, 133, 133);
        --highcharts-neutral-color-20: rgb(92, 92, 92);
        --highcharts-neutral-color-10: rgb(71, 71, 71);
        --highcharts-neutral-color-5: rgb(61, 61, 61);
        --highcharts-neutral-color-3: rgb(57, 57, 57);

        /* Highlight color variations */
        --highcharts-highlight-color-100: rgb(122, 167, 255);
        --highcharts-highlight-color-80: rgb(108, 144, 214);
        --highcharts-highlight-color-60: rgb(94, 121, 173);
        --highcharts-highlight-color-20: rgb(65, 74, 92);
        --highcharts-highlight-color-10: rgb(58, 63, 71);
    }
}

.highcharts-dark {
    /* Colors for data series and points */
    --highcharts-color-0: #b3597c;
    --highcharts-color-1: #c4688c;
    --highcharts-color-2: #78a8d1;
    --highcharts-color-3: #7991d2;
    --highcharts-color-4: #7d7bd4;
    --highcharts-color-5: #977dd5;
   ...

JavaScript

Highcharts.chart('container', {

    chart: {
        styledMode: true
    },

    title: {
        text: 'Styling with prefers-color-scheme'
    },

    xAxis: {
        width: '40%',
        type: 'category'
    },

    yAxis: {
        width: '40%',
        title: {
            text: 'kg'
        }
    },

    series: [{
        type: 'pie',
        allowPointSelect: true,
        keys: ['name', 'y', 'selected', 'sliced'],
        data: [
            ['Apples', 29.9, false],
            ['Pears', 71.5, false],
            ['Oranges', 106.4, false],
            ['Plums', 129.2, false],
            ['Bananas', 144.0, false],
            ['Peaches', 176.0, false],
            ['Prunes', 135.6, true, true],
            ['Avocados', 148.5, false]
        ],
        showInLegend: true,
        center: ['75%', '50%']
    }, {
        type: 'column',
        keys: ['name', 'y'],
        data: [
            ['Apples', 29.9, false],
            ['Pears', 71.5, false],
            ['Oranges', 106.4, false],
            ['Plums', 129.2, false],
            ['Bananas', 144.0, false],
            ['Peaches', 176.0, false],
            ['Prunes', 135.6, true, true],
            ['Avocados', 148.5, false]
        ],
        colorByPoint: true,
        showInLegend: false
    }]
});

[...document.querySelectorAll('input[name="color-mode"]')]
    .forEach(input => {
        input.addEventListener('click', e => {
            document.getElementById('container').className =
                e.target.value === 'none' ? '' : `highcharts-${e.target.value}`;
        });
    });