Examine source code of Dark Chromium-esque Theme

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Dark Chromium-esque Theme",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(50, 54, 57)",
      "toolbar_text": "rgb(242, 244, 244)",
      "frame": "rgb(32, 33, 36)",
      "tab_background_text": "rgb(144, 149, 149)",
      "toolbar_field": "rgb(16, 17, 17)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgba(0, 0, 0, 0)",
      "popup": "rgb(41, 42, 45)",
      "popup_text": "rgb(242, 244, 244)",
      "tab_selected": "rgb(50, 54, 57)",
      "tab_text": "rgb(255, 255, 255)",
      "tab_loading": "rgba(0, 0, 0, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c6721629-abc0-4ac5-88ff-badf80f7da9b}"
    }
  }
}