突然提示 is not hexColor

突然就提示错误，

VM13:1 money/pages/order/index.json: [“backgroundColor”]: “f0f0f0” is not hexColor

之前好好的，而且这个json文件没有被改过，代码如下：

{
  "enablePullDownRefresh": true,
  "navigationBarBackgroundColor": "#fff",
  "navigationBarTextStyle": "black",
  "navigationBarTitleText": "优惠",
  "backgroundColor": "f1f1f1",
  "usingComponents": {
    "barrage":"/component/barrage/barrage"
  }
}