Examine source code of Blue Wave...

{
  "theme": {
    "images": {
      "theme_frame": "BlueWaveH.jpg"
    },
    "colors": {
      "frame": "#042f75",
      "tab_background_text": "#042f75"
    }
  },
  "version": "2.0",
  "name": "Blue Wave...",
  "manifest_version": 2,
  "description": "transparent, blue, black, abstract, wave, My matching wallpaper can be found at: <a href=\"https://outgoing.prod.mozaws.net/v1/1913fe27f2961b850e05f413ee1892009ccbcd9fa831b864a9c8785d561986ce/http%3A//abstract.desktopnexus.com/wallpaper/607920/\" rel=\"nofollow\">http://abstract.desktopnexus.com/wallpaper/607920/</a>"
}