Examine source code of Bright block.02

{
  "theme": {
    "images": {
      "theme_frame": "1211-akaruibulock--33s.jpg"
    },
    "colors": {
      "frame": "#f7fcb0",
      "tab_background_text": "#000"
    }
  },
  "version": "2.0",
  "name": "Bright block.02",
  "manifest_version": 2,
  "description": "明るいブロック。。"
}