Examine source code of false-city

{
  "name": "false-city",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "2020-12-15_06-14.png"
    },
    "colors": {
      "frame": "rgba(23, 29, 35, 1)",
      "tab_background_text": "rgba(183, 197, 211, 1)",
      "toolbar": "rgba(29, 37, 44, 1)",
      "bookmark_text": "rgba(0, 139, 148, 1)",
      "toolbar_field": "rgba(23, 29, 35, 1)",
      "toolbar_field_text": "rgba(0, 139, 148, 1)"
    }
  }
}