Examine source code of Cold and bleak

{
  "theme": {
    "images": {
      "theme_frame": "0918--boad--hantndark-awakooo.jpg"
    },
    "colors": {
      "frame": "#f0d1d1",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Cold and bleak",
  "manifest_version": 2,
  "description": "0918--boad--hantndark-awakooo"
}