Examine source code of Glowing Cherry Blossom

{
  "theme": {
    "images": {
      "theme_frame": "BlackCherryBlossomHeader.JPG"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#f2d9d9"
    }
  },
  "version": "2.0",
  "name": "Glowing Cherry Blossom",
  "manifest_version": 2,
  "description": "Found a Sakura pic online and made it my desk top with some adjustment. Wanted a matching browser theme and it seems I had to do this before it would let me.... :D"
}