Examine source code of Everforest Hard Dark

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Everforest Dark Hard",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(39, 46, 51)",
      "toolbar_text": "rgb(211, 198, 170)",
      "frame": "rgb(39, 46, 51)",
      "tab_background_text": "rgb(140, 133, 111)",
      "toolbar_field": "rgb(46, 56, 60)",
      "toolbar_field_text": "rgb(211, 198, 170)",
      "tab_line": "rgb(46, 56, 60)",
      "popup": "rgb(55, 65, 69)",
      "popup_text": "rgb(211, 198, 170)",
      "icons": "rgb(248, 248, 242)",
      "popup_highlight_text": "rgb(248, 248, 242)",
      "sidebar_highlight_text": "rgb(248, 248, 242)",
      "sidebar_text": "rgb(255, 255, 255)",
      "tab_loading": "rgb(46, 56, 60)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{34ce3d6e-8f1c-4139-b2ea-247204046cd7}"
    }
  }
}