Examine source code of RedBerry

{
  "theme": {
    "images": {
      "theme_frame": "redberry.jpg"
    },
    "colors": {
      "frame": "#706969",
      "tab_background_text": "#0d0a0a"
    }
  },
  "version": "2.0",
  "name": "RedBerry",
  "manifest_version": 2,
  "description": "Fun with red berries motifs.  This is the full color one."
}