Examine source code of Four rabbits

{
  "theme": {
    "images": {
      "theme_frame": "rabbits.png"
    },
    "colors": {
      "frame": "#cc27cf",
      "tab_background_text": "#0621cf"
    }
  },
  "version": "2.0",
  "name": "Four rabbits",
  "manifest_version": 2,
  "description": "Four cute rabbits and blue and pink background."
}