Examine source code of Air Ubuntu Style

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#FFF5D7",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Air Ubuntu Style",
  "manifest_version": 2,
  "description": "Modification of the \"Air KDE Style\" theme where the background color has a slight yellow hue. The original theme has both background and text colors set to black leading to \"black on black\" effect when viewing attachments in Thunderbird..."
}