Examine source code of Barbieee.....

{
  "theme": {
    "images": {
      "theme_frame": "coollogo_com-58353855j.jpg"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#6e3ecf"
    }
  },
  "version": "2.0",
  "name": "Barbieee.....",
  "manifest_version": 2
}