Examine source code of gruvbox material dark

{
  "name": "gruvbox material dark",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Untitled.jpg"
    },
    "colors": {
      "frame": "rgba(41, 40, 40, 1)",
      "tab_background_text": "rgba(224, 129, 155, 1)",
      "toolbar": "rgba(222, 184, 147, 1)",
      "bookmark_text": "rgba(124, 183, 125, 1)",
      "toolbar_field": "rgba(41, 40, 40, 1)",
      "toolbar_field_text": "rgba(245, 149, 62, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{9540e3e5-6ead-4ce2-91fe-f0d9e57b7684}"
    }
  }
}