Examine source code of Winter_Light

{
  "theme": {
    "images": {
      "theme_frame": "WinterLightHCustom.jpg"
    },
    "colors": {
      "frame": "#cedef4",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Winter_Light",
  "manifest_version": 2,
  "description": "lake, grass, shore, freeze, cold, river bank, snow, birch, blue, nature, ice, blowing, frozen, aspen, winter\t\n\nDesigned by MaDonna\n\nMy wallpaper to match is at: <a href=\"https://outgoing.prod.mozaws.net/v1/e50e301973b7c136af1582e25d5547d14c9fcadf57b80304606917f354835ba1/http%3A//nature.desktopnexus.com/wallpaper/1233731/\" rel=\"nofollow\">http://nature.desktopnexus.com/wallpaper/1233731/</a>"
}