Examine source code of Blossom hill.

{
  "theme": {
    "images": {
      "theme_frame": "a913-aoi-hananooka--59-sky.jpg"
    },
    "colors": {
      "frame": "#c7edf5",
      "tab_background_text": "#050e1f"
    }
  },
  "version": "2.0",
  "name": "Blossom hill.",
  "manifest_version": 2,
  "description": "はな咲く丘。"
}