Examine source code of Fallout Vault-Tec

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#155bdb",
      "tab_background_text": "#ffd900"
    }
  },
  "version": "2.0",
  "name": "Fallout Vault-Tec",
  "manifest_version": 2,
  "description": "To survive the nuclear holocaust you'll need to register yourself with Vault-Tec. In preparation you can use this theme!"
}