elementui <el-form-item> 修改label的字体大小颜色

demo

    <el-form-item label="测试" style="display: flex;">
        <el-input v-model="form.test" style="width: 541%;" placeholder="测试"></el-input>
    </el-form-item>

 修改：

    <el-form-item style="display: flex;">
        <template slot="label"> <div class="label">测试</div> </template>
        <el-input v-model="form.test" style="width: 541%;" placeholder="测试"></el-input>
    </el-form-item>