Examine source code of Cutlight Material Dark

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Cut Material Dark Theme",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(36, 41, 47)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(28, 30, 32)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(27, 27, 27)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(86, 87, 89)",
      "popup": "rgb(36, 41, 47)",
      "popup_text": "rgb(255, 255, 255)",
      "button_background_active": "rgb(26, 115, 233)",
      "frame_inactive": "rgb(86, 87, 89)",
      "icons": "rgb(255, 255, 255)",
      "popup_border": "rgb(26, 115, 233)",
      "tab_loading": "rgb(26, 115, 233)",
      "toolbar_bottom_separator": "rgb(86, 87, 89)",
      "toolbar_field_border_focus": "rgb(26, 115, 233)",
      "toolbar_field_separator": "rgb(26, 115, 233)",
      "toolbar_top_separator": "rgb(86, 87, 89)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{61b6ab36-77bf-4a11-a0e9-1612a21e3234}"
    }
  }
}