Examine source code of earth tones

{
  "name": "earth tones",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "HD_transparent_picture.png"
    },
    "colors": {
      "frame": "rgba(176, 148, 113, 1)",
      "tab_background_text": "rgba(122, 93, 61, 1)",
      "toolbar": "rgba(197, 245, 191, 1)",
      "bookmark_text": "rgba(103, 184, 114, 1)",
      "toolbar_field": "rgba(255, 255, 255, 1)",
      "toolbar_field_text": "rgba(186, 224, 190, 1)",
      "tab_line": "rgba(103, 184, 114, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a38ba1be-2b49-4a4d-b1cb-458052ecf52f}"
    }
  }
}