Examine source code of Subtle Violet Gradient

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Relaxed Violet Gradient",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right bottom"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(176, 164, 197, 0.41)",
      "toolbar_text": "rgba(255, 255, 255, 0.9)",
      "frame": "rgb(7, 22, 68)",
      "tab_background_text": "rgb(178, 170, 197)",
      "toolbar_field": "rgb(255, 255, 255)",
      "toolbar_field_text": "rgb(26, 30, 92)",
      "tab_line": "rgba(221, 213, 238, 0.1)",
      "popup": "rgb(255, 255, 255)",
      "popup_text": "rgb(0, 0, 0)",
      "popup_highlight_text": "rgb(84, 91, 140)",
      "tab_loading": "rgba(221, 213, 238, 0.1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{d9bf0ecb-ce42-4d9f-a262-dd2c54f0e191}"
    }
  }
}