Examine source code of gruvbox blue

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "gruvbox blue",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(131, 165, 152)",
      "toolbar_text": "rgb(40, 40, 40)",
      "frame": "rgb(69, 133, 136)",
      "tab_background_text": "rgb(235, 219, 178)",
      "toolbar_field": "rgb(235, 219, 178)",
      "toolbar_field_text": "rgb(40, 40, 40)",
      "tab_line": "rgb(40, 40, 40)",
      "popup": "rgb(189, 174, 147)",
      "popup_text": "rgb(40, 40, 40)",
      "tab_loading": "rgb(40, 40, 40)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{28bd4fc3-63fe-4981-ae02-8825294d2981}"
    }
  }
}