Examine source code of Opera GX Wizard Grey

{
  "manifest_version": 2,
  "version": "2.0",
  "name": "Opera GX Wizard Grey",
  "theme": {
    "colors": {
      "toolbar": "#14111a",
      "tab_line": "#cacaca",
      "tab_text": "#ffffff",
      "bookmark_text": "#e6e9eb",
      "frame": "#090610",
      "frame_inactive": "#090610",
      "tab_background_text": "#d9d9d9",
      "toolbar_field": "#14111a",
      "toolbar_field_text": "#ffffff",
      "toolbar_field_text_focus": "#ffffff",
      "toolbar_field_focus": "#2f2a3d",
      "toolbar_field_border": "#14111a",
      "toolbar_field_border_focus": "#2f2a3d",
      "toolbar_field_highlight": "#cacaca",
      "toolbar_field_highlight_text": "#000000",
      "toolbar_field_separator": "#2e2937",
      "toolbar_text": "#e6e9eb",
      "toolbar_top_separator": "#cacaca",
      "toolbar_bottom_separator": "#14111a",
      "toolbar_vertical_separator": "#2e2937",
      "tab_background_separator": "#47454c",
      "popup": "#19171f",
      "popup_text": "#ffffff",
      "popup_border": "#717074",
      "popup_highlight": "#7d7a84",
      "popup_highlight_text": "#ffffff",
      "tab_loading": "#808186",
      "tab_selected": "#14111a",
      "sidebar": "#131218",
      "sidebar_highlight": "#373737",
      "sidebar_highlight_text": "#ffffff",
      "sidebar_text": "#ffffff",
      "sidebar_border": "#000000",
      "button_background_active": "#0e0c12",
      "button_background_hover": "#100e15",
      "icons": "#e6e9eb",
      "icons_attention": "#cacaca",
      "ntp_background": "#1c1d1f",
      "ntp_link": "#ffffff",
      "ntp_text": "#ffffff"
    }
  }
}