Examine source code of Beautiful Solid Blue

{
  "manifest_version": 2,
  "browser_specific_settings": {
    "gecko": {
      "id": "BeautifulSolidBlue@Godie"
    }
  },
  "version": "1.1",
  "name": "Beautiful Solid Blue",
  "author": "GODIE",
  "description": "Tema Azul para Firefox.",
  "icons": {
    "32": "icon-32.png"
  },
  "theme": {
    "properties": {
      "color_scheme": "dark",
      "content_color_scheme": "dark"
    },
    "colors": {
      "frame": "#252a48",
      "tab_background_text": "#b3b3b3",
      "frame_inactive": "#323755",
      "toolbar": "#252a48",
      "toolbar_text": "#b3b3b3",
      "toolbar_field": "transparent",
      "toolbar_field_text": "#e5e5e6",
      "toolbar_top_separator": "#252a48",
      "toolbar_bottom_separator": "#1d223d",
      "toolbar_field_border": "#383d58",
      "toolbar_field_focus": "#1c213cfe",
      "toolbar_field_border_focus": "#454f87",
      "toolbar_field_highlight": "#3e3bcd",
      "toolbar_field_highlight_text": "#fff",
      "toolbar_field_text_focus": "#e5e5e6",
      "toolbar_vertical_separator": "#34344b",
      "button_background_hover": "#3d4576",
      "button_background_active": "#1a1e32",
      "icons": "#d8d8d9",
      "icons_attention": "#7681bc",
      "ntp_background": "#232843",
      "ntp_text": "#e5e5e6",
      "ntp_card_background": "#313955",
      "popup": "#1d223dfd",
      "popup_text": "#e5e5e6",
      "popup_border": "#383d58",
      "popup_highlight": "#3e3bcd",
      "sidebar": "#232843",
      "sidebar_text": "#d3d8db",
      "sidebar_border": "#4f485f70",
      "sidebar_highlight": "#454f87",
      "sidebar_highlight_text": "#EEEEEE",
      "tab_line": "#4a548c",
      "tab_selected": "#404a82",
      "tab_loading": "#fff",
      "tab_background_separator": "#0a090c",
      "tab_text": "#ffffff"
    }
  }
}