为highcharts中的每列设置不同的颜色

Highcharts.chart('container', {
    chart: {
        type: 'column'
    },
    title: {
        text: '每列不同颜色的Highcharts柱状图'
    },
    xAxis: {
        categories: ['Category 1', 'Category 2', 'Category 3']
    },
    yAxis: {
        title: {
            text: 'Y轴'
        }
    },
    series: [{
        name: 'Series 1',
        data: [1, 2, 3],
        color: 'red'
    }, {
        name: 'Series 2',
        data: [4, 5, 6],
        color: 'blue'
    }, {
        name: 'Series 3',
        data: [7, 8, 9],
        color: 'green'
    }]
});