The pie chart nested in echarts failed to color each series?

series: [

    {
        name:"",
        type:"pie",
        radius: ["55%", "70%"],
        avoidLabelOverlap: false,
        label: {
            normal: {
                show: false,
                position: "inner"
            },
            emphasis: {
                show: true,
                textStyle: {
                    fontSize: "20",
                    fontFamily: "SimHei",
                    fontWeight: "bold"
                }
            }
        },
        labelLine: {
            normal: {
                show: false
            },
            emphasis:{
                show:true
            }
        },
        data: this.pieItems,
        //color
        // color:["-sharp075F9F","-sharp15A93F","-sharpD10807","-sharpF79101","-sharp63869E","-sharp14B8CA"]
    },
    {
        name:"",
        type:"pie",
        radius: ["40%", "55%"],
        data:[
            {value:310, name:" "}
        ],
        label:{
            normal:{
                show:false
            },
            emphasis:{
                show:false
            }
        },
        tooltip:{
            show:false
        },
        color:["-sharp393E49"],
        silent:true

    },
    {
        name:"",
        type:"pie",
        radius: ["25%", "40%"],
        data:[
            {value:310, name:" "}
        ],
        color:["-sharp363739"],
        silent:true

    },
    {
        name:"",
        type:"pie",
        radius: [0, "25%"],
        data:[
            {value:310, name:" "}
        ],

        color:["-sharp3E3E40"],
        silent:true
    },
    {
        name:"",
        type:"pie",
        radius:["70%","85%"],
        data:[
            {value:310, name:" "}
        ],
        color:["-sharp393E49"],
        silent:true,
        labelLine: {
            normal: {
                show: false
            },
            emphasis:{
                show:false
            }
        }
    },
    {
        name:"",
        type:"pie",
        radius:["85%","100%"],
        data:[
            {value:310, name:" "}
        ],
        color:["-sharp303646"],
        silent:true,
        labelLine: {
            normal: {
                show: false
            },
            emphasis:{
                show:false
            }
        }
    }

]

above is a nested pie chart setting for each series. The current style is as follows:

:

I can"t figure out why, please give me some advice!

Feb.28,2021
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1bdfbfa-3147f.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1bdfbfa-3147f.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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