Examine source code of Sofa gray

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Soft gray",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(97, 95, 97)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(92, 91, 93)",
      "tab_background_text": "rgb(180, 180, 180)",
      "toolbar_field": "rgb(67, 67, 75)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(165, 165, 165)",
      "popup": "rgba(92, 91, 93, 0.89)",
      "popup_text": "rgb(255, 255, 255)",
      "tab_loading": "rgb(165, 165, 165)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{3c0789c4-f74d-46bb-845f-492fc1eb166b}"
    }
  }
}