Examine source code of Graphite Dark Theme

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Graphite GTK Theme - Black",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(240, 240, 240)",
      "toolbar_text": "rgb(100, 100, 100)",
      "frame": "rgb(45, 45, 45)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(240, 240, 240)",
      "toolbar_field_text": "rgb(45, 45, 45)",
      "tab_line": "rgb(45, 45, 45)",
      "popup": "rgb(255, 255, 255)",
      "popup_text": "rgb(45, 45, 45)",
      "tab_loading": "rgb(45, 45, 45)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a9a206e3-c807-4e20-bfe4-82563ea156bb}"
    }
  }
}