Examine source code of The toy march

{
  "theme": {
    "images": {
      "theme_frame": "a-4-10102fu--00-01-02-03-04-05-omochaland.jpg"
    },
    "colors": {
      "frame": "#f5d7d7",
      "tab_background_text": "#dcf2f0"
    }
  },
  "version": "2.0",
  "name": "The toy march",
  "manifest_version": 2,
  "description": "a-4-おもちゃの行進"
}