echarts图例legend中name和数值设置为不同的颜色

legend{
    formatter: function(name) {
          var data = option.series[0].data;
          var tarValue = ''
          for (var i = 0; i < data.length; i++) {
            if (data[i].name == name) {
              tarValue = data[i].value;
            }
          }
          return "{name|" +name +"} {value|"+tarValue+"}";
     },
    textStyle:{
            fontSize: 14,
            color: '#343D54',
            rich: {
              value: {
                    color: '#1252AF',
                    fontSize: 14,
                },
            }
        },
}