The input input box modifies the font color and placeholder color

 Input content color

.el-input__inner::placeholder {
    color: red;
}

 Prompt placeholder when not entered

.el-input__inner::placeholder {color:  #31E5F5;
}

or

<style rel="stylesheet/scss" lang="scss" scoped>
//修改字体颜色大小
  /deep/.sale_sel .el-input--small {
    color: #101010;
    font-size: 14px;
  }
//或者  修改字体颜色大小
  /deep/.sale_sel .el-input__inner{
   color: #101010;
    font-size: 14px;
}

修改未输入时字体大小和颜色
 /deep/ .el-input__inner::placeholder {
    color: #BBBBBB;
  }
</style>