要素テーブルの境界線の色を変更する

.el-table--border:after,
.el-table--group:after,
.el-table:before {
    background-color: #cecece;
}

.el-table--border,
.el-table--group {
    border-color: #cecece;
}

.el-table td,
.el-table th.is-leaf {
    border-color:  #cecece;
}

.el-table--border th,
.el-table--border th.gutter:last-of-type {
     border-color:  #cecece;
}

.el-table--border td,
.el-table--border th {
     border-color:  #cecece;
}