el-table 如何动态的修改某一单元格中字体颜色

关键代码

 <el-table-column header-align="center" align="center" v-for="item in notFixedData" :key="item.prop"
               v-if="item.isTrue" :prop="item.prop" :label="item.title" :min-width="item.width">
   <template slot-scope="scope">
       <span v-if="scope.row[item.prop] !== '缺'">{{scope.row[item.prop]}}</span>
       <span v-else style="color: red;">{{scope.row[item.prop]}}</span>
   </template>
</el-table-column>