系列颜色太接近-错误示例echarts 柱状配置项内容和展示

      app.title = '堆叠条形图';

option = {
     backgroundColor: "#fff",
    color: ["#2A9AD4","#37A2DA","#3BACE7", "#3DBFF8","#54CAFD",],
    tooltip : {
        trigger: 'axis',
        axisPointer : {            // 坐标轴指示器，坐标轴触发有效
            type : 'shadow'        // 默认为直线，可选为：'line' | 'shadow'
        }
    },
    legend: {
        data: ['访问', '邮件','广告','视频','搜索']
    },
    grid: {
        containLabel: true
    },
    xAxis:  {
        type: 'value'
    },
    yAxis: {
        type: 'category',
        data: ['周一','周二','周三','周四','周五','周六','周日']
    },
    series: [
        {
            name: '访问',
            type: 'bar',
            stack: '总量',
            label: {
                normal: {
                    show: true,
                    position: 'insideRight'
                }
            },
            data: [220, 132, 121, 134, 190,98,127]
        },
        {
            name: '邮件',
            type: 'bar',
            stack: '总量',
            label: {
                normal: {
                    show: true,
                    position: 'insideRight'
                }
            },
            data: [120, 132, 101, 134,190,101,137]
        },
        {
            name: '广告',
            type: 'bar',
            stack: '总量',
            label: {
                normal: {
                    show: true,
                    position: 'insideRight'
                }
            },
            data: [220, 182, 191, 234, 190, 330, 310]
        },
        {
            name: '视频',
            type: 'bar',
            stack: '总量',
            label: {
                normal: {
                    show: true,
                    position: 'insideRight'
                }
            },
            data: [150, 212, 201, 154, 190,201,187 ]
        },
        {
            name: '搜索',
            type: 'bar',
            stack: '总量',
            label: {
                normal: {
                    show: true,
                    position: 'insideRight'
                }
            },
            data: [120, 132, 151, 134, 190,180,174 ]
        }
    ]
};