Examine source code of Opera GX Default

{
  "manifest_version": 2,
  "version": "1.0.1",
  "name": "Opera GX",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(18, 16, 25)",
      "toolbar_text": "rgb(204, 204, 204)",
      "frame": "rgb(9, 8, 13)",
      "tab_background_text": "rgb(153, 153, 153)",
      "toolbar_field": "rgb(18, 16, 25)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(36, 32, 49)",
      "popup": "rgb(28, 23, 38)",
      "popup_text": "rgb(255, 255, 255)",
      "button_background_active": "rgb(36, 32, 49)",
      "button_background_hover": "rgb(36, 32, 49)",
      "frame_inactive": "rgb(9, 8, 13)",
      "icons_attention": "rgb(250, 30, 78)",
      "icons": "rgb(250, 30, 78)",
      "ntp_background": "rgb(18, 16, 25)",
      "ntp_text": "rgb(255, 255, 255)",
      "popup_border": "rgb(28, 23, 38)",
      "popup_highlight_text": "rgb(255, 255, 255)",
      "popup_highlight": "rgb(143, 29, 63)",
      "sidebar_border": "rgb(28, 23, 38)",
      "sidebar_highlight_text": "rgb(255, 255, 255)",
      "sidebar_highlight": "rgb(143, 29, 63)",
      "sidebar_text": "rgb(255, 255, 255)",
      "sidebar": "rgb(28, 23, 38)",
      "tab_background_separator": "rgb(250, 30, 78)",
      "tab_loading": "rgb(250, 30, 78)",
      "tab_selected": "rgb(36, 32, 49)",
      "tab_text": "rgb(255, 255, 255)",
      "toolbar_bottom_separator": "rgb(18, 16, 25)",
      "toolbar_field_border_focus": "rgb(36, 32, 49)",
      "toolbar_field_border": "rgb(18, 16, 25)",
      "toolbar_field_focus": "rgb(36, 32, 49)",
      "toolbar_field_highlight_text": "rgb(0, 0, 0)",
      "toolbar_field_highlight": "rgb(250, 30, 78)",
      "toolbar_field_separator": "rgb(250, 30, 78)",
      "toolbar_field_text_focus": "rgb(255, 255, 255)",
      "toolbar_top_separator": "rgb(250, 30, 78)",
      "toolbar_vertical_separator": "rgb(250, 30, 78)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{02e6e82e-89b1-4752-8c64-1dc9216fa788}"
    }
  }
}