Reading a DTCG token file

In this token file, what value does color.action.primary resolve to?

{
  "color": {
    "teal": {
      "600": { "$type": "color", "$value": "#0F766E" }
    },
    "action": {
      "primary": { "$type": "color", "$value": "{color.teal.600}" }
    }
  }
}