效果：

动态添加颜色 随机色

代码：

<div
   class="mt-10 firstTitle"
   v-show="pictureType != 'card' && pictureType != 'table' && pictureType !=  'inventory'"
 >
   <i
     :class="[colorSystemShow ? 'el-icon-com-xiajiantou' : 'el-icon-com-youjiantou']"
     @click="colorSystem_before"
     class="c-pointer"
   ></i>
   <span class="ml-5">色板</span>
   <span class="c-pointer pull-right" @click="colorConfig">配置</span>
   <div v-show="colorSystemShow" class="mt-10 secondTitle colorSystem pl-5">
     <div v-for="itemOut in colorList" style="height:20px;" class="mt-5">
       <span
         v-for="itemIn in itemOut.value"
         :style="{background:itemIn}"
         style="display:inline-block;width:13.5px;height:20px;"
       ></span>
     </div>
   </div>
 </div>

组件：

<template>
  <el-dialog
    title="色板配置"
    :visible.sync="isColorConfigDialog"
    width="690px"
    :close-on-click-modal="false"
    :show-close="false"
    top="90px"
  >
    <div class="mainDiv">
      <el-button class="ml-10" @click="add()" type="primary" size="mini" icon="el-icon-plus">新增色板</el-button>
      <div v-for="(itemOut,i) in colorListCopy" style="height:20px;" class="mt-5">
        <span>{{i+1}}、</span>
        <span
          v-for="(itemIn,index) in itemOut.value"
          :style="{background:itemIn}"
          style="display:inline-block;height:20px;"
        >
          <el-input
            style="width:30px;"
            v-model="aaa"
            :value="itemIn"
            type="color"
            @change="colorChange($event,i,index)"
          ></el-input>
        </span>
        <i class="el-icon-delete ml-10 mt-3 font16 c-pointer" @click="del(i)" title="删除"></i>
        <!-- <span class="pull-right" style="margin-top:3px;">
        </span>-->
      </div>
    </div>
    <span slot="footer" class="dialog-footer">
      <el-button size="mini" type="primary" @click="save">确 定</el-button>
      <el-button size="mini" @click="exit">取 消</el-button>
    </span>
  </el-dialog>
</template>
<script>
export default {
  name: 'colorConfigDialog',
  props: ['isColorConfigDialog', 'colorList'],
  data() {
    return {
      aaa: '',
      colorListCopy: []
    }
  },
  mounted() {
    this.colorListCopy = JSON.parse(JSON.stringify(this.colorList))
  },
  methods: {
    save() {
      this.$emit('saveColorConfig', this.colorListCopy)
      this.$emit('closeColorConfigDialog')
    },
    exit() {
      this.$emit('closeColorConfigDialog')
    },
    colorChange(e, i, index) {
      this.aaa = e
      this.colorListCopy[i].value[index] = e
      this.$forceUpdate()
    },
    color16() {
      //十六进制颜色随机
      const r = Math.floor(Math.random() * 256)
      const g = Math.floor(Math.random() * 256)
      const b = Math.floor(Math.random() * 256)
      const color = `#${r.toString(16)}${g.toString(16)}${b.toString(16)}`
      return color
    },
    // 添加
    add() {
      let arr = []
      for (const item in this.colorListCopy[0].value) {
        let color = this.color16()
        arr.push(color)
      }
      let inParamsNew = [...this.colorListCopy]
      let obj = {
        key: this.colorListCopy.length,
        value: arr
      }
      inParamsNew.push(obj)
      this.colorListCopy = inParamsNew
    },
    del(index) {
      let inParamsNew = [...this.colorListCopy]
      if (inParamsNew.length < 2) {
        this.$message({
          type: 'warning',
          duration: '2000',
          message: '必须保留一行'
        })
        return
      }
      inParamsNew.splice(index, 1)
      this.colorListCopy = inParamsNew
    }
  }
}
</script>

<style lang="less" rel="stylesheet/less" scoped="true">
@import url('../../../common/less/variable.less');
.mainDiv {
  height: calc(100vh - 260px);
  overflow: auto;
}
/deep/input {
  border: 0; // 去除未选中状态边框
  outline: none; // 去除选中状态边框
  background-color: rgba(0, 0, 0, 0); // 透明背景
}
/deep/input[type='"color"']::-webkit-color-swatch-wrapper {
  padding: 0;
}
/deep/input[type='color']::-webkit-color-swatch {
  border: 0;
}
/deep/.el-input--mini .el-input__inner {
  height: 20px;
}
</style>

数据：

colorList: [
   {
     key: 1,
     value: ["#5B8FF9","#CDDDFD","#61DDAA","#CDF3E4","#65789B","#CED4DE","#F6BD16","#FCEBB9","#7262fd","#D3CEFD","#78D3F8","#D3EEF9","#9661BC","#DECFEA","#F6903D","#FFE0C7","#008685","#BBDEDE","#F08BB4","#FFE0ED"]
   },
   {
     key: 2,
     value: ["#FF6B3B","#626681","#FFC100","#9FB40F","#76523B","#DAD5B5","#0E8E89","#E19348","#F383A2","#247FEA","#2BCB95","#B1ABF4","#1D42C2","#1D9ED1","#D64BC0","#255634","#8C8C47","#8CDAE5","#8E283B","#791DC9"]
   },
   {
     key: 3,
     value: ["#025DF4","#DB6BCF","#2498D1","#BBBDE6","#4045B2","#21A97A","#FF745A","#007E99","#FFA8A8","#2391FF","#FFC328","#A0DC2C","#946DFF","#626681","#EB4185","#CD8150","#36BCCB","#327039","#803488","#83BC99"]
   },
   {
     key: 4,
     value: ["#FF4500","#1AAF8B","#406C85","#F6BD16","#B40F0F","#2FB8FC","#4435FF","#FF5CA2","#BBE800","#FE8A26","#946DFF","#6C3E00","#6193FF","#FF988E","#36BCCB","#004988","#FFCF9D","#CCDC8A","#8D00A1","#1CC25E"]
   }
 ]