Examine source code of Opera GX

{
  "manifest_version": 2,
  "version": "9.0",
  "name": "Opera GX",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(20, 17, 26)",
      "toolbar_text": "rgb(251, 29, 78)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(251, 29, 78)",
      "toolbar_field": "rgb(20, 17, 26)",
      "toolbar_field_text": "rgb(251, 29, 78)",
      "toolbar_field_border": "rgb(20, 17, 26)",
      "toolbar_field_border_focus": "rgb(20, 17, 26)",
      "tab_line": "rgb(251, 29, 78)",
      "popup": "rgb(20, 17, 26)",
      "popup_border": "rgb(20, 17, 26)",
      "ntp_background": "rgb(20, 17, 26)",
      "ntp_background_text": "rgb(251, 29, 78)",
      "ntp_text": "rgb(251, 29, 78)",
      "sidebar": "rgb(20, 17, 26)",
      "sidebar_text": "rgb(251, 29, 78)",
      "sidebar_border": "rgb(251, 29, 78)",
      "button_background_hover": "rgb(20, 17, 26)",
      "popup_text": "rgb(251, 29, 78)",
      "tab_loading": "rgb(251, 29, 78)"
    }
  }
}