ElementStacks

HTML

<script src="http://highcharts.com/js/testing.js"></script>
<div id="container" style="height: 400px"></div>

JavaScript

var chart = new Highcharts.Chart({
    chart: {
        renderTo: 'container',
        defaultSeriesType: 'column'
    },
    yAxis: {
        min: 0,
        max: 100
    },
    plotOptions: {
        series: {
            color: {
                linearGradient: [0, 0, 0, 350],
                stops: [
                    [0, 'rgb(0, 255, 0)'],
                    [0.5, 'rgb(0,255,0)'],
                    [1, 'rgb(0, 0, 0)']
                ]
            }        
        }
    },
    series: [{
        data: [25, 50, 100]        
    }]
});