Examine source code of Stable blue sky...

{
  "theme": {
    "images": {
      "theme_frame": "s0309shuu-0718--sky-l4.jpg"
    },
    "colors": {
      "frame": "#ebdfdf",
      "tab_background_text": "#f0d1a8"
    }
  },
  "version": "2.0",
  "name": "Stable blue sky...",
  "manifest_version": 2,
  "description": "s0309shuu-0718--sky-l4  \ns0309futta-shuu-0718--sky-l4\n17:25 2013/03/09\n\n0718--sikkariaosora-oo"
}