Examine source code of cannabis

{
  "name": "cannabis",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "unnamed.png"
    },
    "colors": {
      "frame": "rgba(94, 235, 76, 1)",
      "tab_background_text": "rgba(221, 247, 215, 1)",
      "toolbar": "rgba(241, 250, 240, 1)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(58, 209, 66, 1)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)"
    }
  }
}