echart 不同颜色（柱状图）

var option = {
            tooltip: {
                trigger: 'axis'
            },
            grid: {
                left: '3%',
                right: '4%',
                bottom: '3%',
                containLabel: true
            },
            xAxis: [
                {
                    type: 'category',
                    data: DATA.xData,
                    axisTick: {
                        alignWithLabel: true
                    }
                }
            ],
            yAxis: [
                {
                    type: 'value',
                    name: count
                }
            ],
            series: [
                {
                    name: count,
                    type: 'bar',
                    barWidth: '60%',
                    itemStyle: {
                        normal: {
                            color: function(params) {
                                var colorList = ["#3398db", "#434348", "#90ed7d", "#f7a35c", "#61a0a8", "#61a0a8", "#91c7ae", "#2f4554"];
                                return colorList[params.dataIndex]
                            }
                        }
                    },
                    label: {
                        normal: {
                            show: true,
                            position: 'top'
                        }
                    },
                    data: DATA.yData
                }
            ]
        };