Examine source code of Brushed Tabs Light

{
  "name": "Brushed Tabs Light",
  "manifest_version": 2,
  "version": "2.3",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "header3.jpg"
      ]
    },
    "properties": {
      "color_scheme": "light"
    },
    "colors": {
      "frame": "rgba(143, 143, 143, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(143, 143, 143)",
      "toolbar_bottom_separator": "rgba(143, 143, 143)",
      "popup": "rgb(255, 255, 255)",
      "popup_text": "rgb(25, 25, 25)",
      "ntp_background": "rgb(255, 255, 255)",
      "ntp_text": "rgb(25, 25, 25)",
      "toolbar_field_highlight": "rgb(171, 216, 252)",
      "toolbar_field_border_focus": "rgb(171, 216, 252)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{47122d37-bd8e-427b-8d63-777b9c81d30f}"
    }
  }
}