Emulation.setDefaultBackgroundColorOverride

{
  "name": "setDefaultBackgroundColorOverride",
  "description": "Sets or clears an override of the default background color of the frame. This override is used if the content does not specify one.",
  "parameters": [
    {
      "name": "color",
      "$ref": "DOM.RGBA",
      "optional": true,
      "description": "RGBA of the default background color. If not specified, any existing override will be cleared."
    }
  ]
}