Examine source code of Dutch flag

{
  "theme": {
    "images": {
      "theme_frame": "dutch_header.jpg"
    },
    "colors": {
      "frame": "#ff6600",
      "tab_background_text": "#ff6600"
    }
  },
  "version": "2.0",
  "name": "Dutch flag",
  "manifest_version": 2,
  "description": "The Dutch Flag."
}