修改线图线条颜色，图例图标颜色及图例文字颜色

{
    "series": [{
        //线条颜色设置
        "lineStyle": {
            "normal": {
                "color": "black"
            }
        },
        //图例中图标颜色设置
        "color": "green"
    }, {
        "lineStyle": {
            "normal": {
                "color": "red"
            }
        },
        "color": "red"
    }],
    "legend": {
        "icon": "line",
        //图例对应文字颜色设置
        "textStyle": {
            "color": "green"
        }
    }
}