Selecting a JSON object with a colon in the key

I'm using a third party tool that POSTs a JSON response. It works great, but one of the keys I need to use has a colon in it and I have no idea how to select this object in JavaScript.

For example:

{
  "photo": {
    "reg": {
      "id": 50
    },
    "thumb": {
      "id": 51
    },
    ":original": {
      "id": 53"
    }
  }
}

How do I select photo.:original.id? I get syntax errors when I leave the colon in, and undefined when I try dropping the colon.


It's simple:

photo[':original'].id

Dot/bracket notation