Examine source code of Complementary Contrast

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Complementary Contrast",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg",
        "images/1.jpg",
        "images/2.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right center",
        "center center",
        "center top"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat",
        "no-repeat",
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(109, 7, 77)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(52, 138, 95)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(255, 255, 255)",
      "toolbar_field_text": "rgb(0, 0, 0)",
      "tab_line": "rgb(255, 236, 0)",
      "popup": "rgb(42, 50, 46)",
      "popup_text": "rgb(255, 225, 82)",
      "button_background_active": "rgb(159, 140, 255)",
      "button_background_hover": "rgb(242, 111, 216)",
      "frame_inactive": "rgb(90, 154, 189)",
      "icons_attention": "rgb(68, 160, 209)",
      "icons": "rgb(255, 255, 255)",
      "ntp_background": "rgb(14, 208, 144)",
      "ntp_text": "rgb(255, 255, 255)",
      "popup_border": "rgb(0, 255, 215)",
      "popup_highlight_text": "rgb(0, 0, 0)",
      "popup_highlight": "rgba(196, 217, 254, 0.91)",
      "sidebar_border": "rgb(255, 0, 161)",
      "sidebar_highlight_text": "rgb(252, 255, 117)",
      "sidebar_highlight": "rgb(117, 1, 90)",
      "sidebar_text": "rgb(0, 255, 171)",
      "sidebar": "rgb(112, 146, 164)",
      "tab_selected": "rgb(101, 22, 175)",
      "tab_text": "rgb(252, 255, 117)",
      "toolbar_bottom_separator": "rgb(255, 225, 82)",
      "tab_loading": "rgb(255, 236, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{16536cf3-9439-4320-98c5-a276e631d9b5}"
    }
  }
}