areastyle显示问题echarts line' },{ data: [1400, 1400, 1400, 1400, 1400, 1400, 1400], type: 'line配置项内容和展示

中间区域我想显示黄色，但是目前好像因为颜色覆盖问题导致显示了橙色

      option = {
    xAxis: {
        type: 'category',
        data: ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun']
    },
    yAxis: {
        type: 'value'
    },
    series: [{
        data: [820, 932, 901, 934, 1290, 1330, 1320],
        type: 'line'
    },{
        data: [1400, 1400, 1400, 1400, 1400, 1400, 1400],
        type: 'line',
        areaStyle: {
            color: 'rgb(255,0,0)'
        }
    },{
        data: [900, 900, 900, 900, 900, 900, 900],
        type: 'line',
        areaStyle: {
            color: 'rgb(255,255,0)'
        }
    },{
        data: [500, 500, 500, 500, 500, 500, 500],
        type: 'line',
        areaStyle: {
            color: 'rgb(255,0,0)'
        }
    }]
};