Examine source code of february fest

{
  "theme": {
    "images": {
      "theme_frame": "head.png"
    },
    "colors": {
      "frame": "#d44646",
      "tab_background_text": "#ede4e4"
    }
  },
  "version": "2.0",
  "name": "february fest",
  "manifest_version": 2,
  "description": "to share the 17 February festivals"
}