Examine source code of GengarPurple

{
  "name": "GengarPurple",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "Gengar3.png"
    },
    "colors": {
      "frame": "rgba(86, 38, 112, 1)",
      "tab_background_text": "rgba(226, 214, 227, 1)",
      "toolbar": "rgba(42, 19, 64, 1)",
      "bookmark_text": "rgba(226, 214, 227, 1)",
      "toolbar_field": "rgba(119, 89, 122, 1)",
      "toolbar_field_text": "rgba(226, 214, 227, 1)",
      "tab_line": "rgba(226, 214, 227, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{d2c47ac6-76c9-45ca-9c45-ec234fb6fecb}"
    }
  }
}