Examine source code of Toxic Jungle

{
  "name": "Toxic Jungle",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "nausicaa.png"
    },
    "colors": {
      "frame": "rgba(234, 222, 211, 1)",
      "tab_background_text": "rgba(26, 62, 59, 1)",
      "bookmark_text": "rgba(26, 62, 59, 1)",
      "toolbar_field": "rgba(26, 62, 59, 1)",
      "toolbar_field_text": "rgba(234, 222, 211, 1)"
    }
  }
}