Examine source code of Nexus

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#ffb5d3",
      "tab_background_text": "#5f068f"
    }
  },
  "version": "2.0",
  "name": "Nexus",
  "manifest_version": 2,
  "description": "This is Nexus stock wallpaper."
}