Examine source code of Orange

{
  "theme": {
    "images": {
      "theme_frame": "1_1.png"
    },
    "colors": {
      "frame": "#ed1717",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Orange",
  "manifest_version": 2,
  "description": "yellow +orange "
}