Examine source code of Hues

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Spectrum",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(58, 58, 62, 0.8)",
      "toolbar_text": "rgb(245, 239, 186)",
      "frame": "rgb(140, 140, 145)",
      "tab_background_text": "rgb(252, 252, 234)",
      "toolbar_field": "rgba(24, 23, 31, 0.2)",
      "toolbar_field_text": "rgb(182, 181, 174)",
      "tab_line": "rgb(251, 225, 12)",
      "popup": "rgb(33, 33, 34)",
      "popup_text": "rgb(230, 222, 203)",
      "ntp_background": "rgba(1, 44, 3, 0.8)",
      "ntp_text": "rgb(23, 40, 23)",
      "tab_loading": "rgba(181, 56, 227, 0.8)",
      "tab_selected": "rgba(187, 187, 236, 0)",
      "tab_text": "rgba(208, 189, 215, 0.8)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{1d6b719a-5946-487c-8ed2-cb710a7ed509}"
    }
  }
}