echarts配置柱状图的颜色

option = {
title: {
text: '深圳月最低生活费组成（单位:元）',
subtext: 'From ExcelHome',
sublink: 'http://e.weibo.com/1341556070/AjQH99che'
},
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'
},
formatter: function (params) {
var tar = params[1];
return tar.name + '

' + tar.seriesName + ' : ' + tar.value;
}
},
grid: {
left: '3%',
right: '4%',
bottom: '3%',
containLabel: true
},
xAxis: {
type : 'category',
splitLine: {show:false},
data : ['总费用','房租','水电费','交通费','伙食费','日用品数']
},
yAxis: {
type : 'value'
},
series: [
{
name: '辅助',
type: 'bar',
stack: '总量',
itemStyle: {
normal: {
barBorderColor: 'rgba(255,0,0,0)',
color: 'rgba(0,0,0,0)'
},
emphasis: {
barBorderColor: 'rgba(255,155,0,0)',
color: 'rgba(155,155,0,0)'
}
},
data: [0, 0, 0, 0,0, 0]
},
{
name: '生活费',
type: 'bar',
stack: '总量',
label: {
normal: {
show: true,
position: 'inside'
}
},
itemStyle:{
normal:{
color:'#4ad2ff'
}
},
data:[{value:2900,itemStyle:{normal:{color:"#ff0000"}}}, 1500, 300, 200, 900, 300]
}
]
};