Examine source code of DigiChrome Cobalt

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#1d2542",
      "tab_background_text": "#d2d8fc"
    }
  },
  "version": "2.0",
  "name": "DigiChrome Cobalt",
  "manifest_version": 2,
  "description": "Simple, elegant digitized chrome theme. Add to your browser and click Fav ♡ if you like it. Works great and looks clean! Enjoy"
}