Examine source code of Chrome Dark Grey Theme

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Chrome Dark",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(69, 69, 69)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(43, 43, 43)",
      "tab_background_text": "rgb(202, 202, 202)",
      "toolbar_field": "rgb(40, 40, 40)",
      "toolbar_field_text": "rgb(226, 226, 226)",
      "tab_line": "rgb(43, 43, 43)",
      "popup": "rgb(43, 43, 43)",
      "popup_text": "rgb(199, 199, 199)",
      "ntp_background": "rgb(60, 60, 60)",
      "ntp_text": "rgb(226, 226, 226)",
      "sidebar_border": "rgb(43, 43, 43)",
      "tab_loading": "rgb(43, 43, 43)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{5476ba5e-741d-4773-8be4-bab6531836b0}"
    }
  }
}