Examine source code of pigeon white

{
  "theme": {
    "images": {
      "theme_frame": "gvercin.1.jpg"
    },
    "colors": {
      "frame": "#f5f10a",
      "tab_background_text": "#0c7ded"
    }
  },
  "version": "2.0",
  "name": "pigeon white",
  "manifest_version": 2,
  "description": "pigeon white"
}