Examine source code of A Journey

{
  "name": "A Journey",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "journey1.png"
    },
    "colors": {
      "frame": "rgba(229, 230, 232, 1)",
      "tab_background_text": "rgba(97, 25, 1, 0.75)",
      "toolbar": "rgba(212, 170, 123, 0.49)",
      "bookmark_text": "rgba(107, 39, 0, 0.89)",
      "toolbar_field": "rgba(255, 206, 150, 0.47)",
      "toolbar_field_text": "rgba(145, 58, 29, 0.59)"
    }
  }
}