Examine source code of Green Fella

{
  "name": "Green Fella",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "stock-photo-green-fella-143673445.jpg"
    },
    "colors": {
      "frame": "rgba(14, 32, 66, 1)",
      "tab_background_text": "rgba(201, 201, 201, 1)",
      "toolbar": "rgba(7, 18, 41, 1)",
      "bookmark_text": "rgba(201, 201, 201, 1)",
      "toolbar_field": "rgba(7, 18, 41, 1)",
      "toolbar_field_text": "rgba(201, 201, 201, 1)"
    }
  }
}