Examine source code of Princesse Cendrillon

{
  "theme": {
    "images": {
      "theme_frame": "Cendrillon.png"
    },
    "colors": {
      "frame": "#55a3ba",
      "tab_background_text": "#4ea9c4"
    }
  },
  "version": "2.0",
  "name": "Princesse Cendrillon",
  "manifest_version": 2
}