Examine source code of Gold theme

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Gold theme",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-008-60d2718f8c915b5ba09f31df5555b459.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(210, 172, 71)",
      "toolbar_text": "rgb(121, 94, 26)",
      "frame": "rgb(174, 134, 37)",
      "tab_background_text": "rgb(210, 172, 71)",
      "toolbar_field": "rgb(237, 201, 103)",
      "toolbar_field_text": "rgb(121, 94, 26)",
      "tab_line": "rgb(174, 134, 37)",
      "popup": "rgb(227, 187, 79)",
      "popup_text": "rgb(140, 109, 31)",
      "tab_loading": "rgb(174, 134, 37)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{88bc467e-85a7-4f93-9a3e-5b5236496392}"
    }
  }
}