Examine source code of tourbillonbleu

{
  "theme": {
    "images": {
      "theme_frame": "tourbillonbleu1.jpeg"
    },
    "colors": {
      "frame": "#c8cfd9",
      "tab_background_text": "#193d9e"
    }
  },
  "version": "2.0",
  "name": "tourbillonbleu",
  "manifest_version": 2
}