Examine source code of Rainbow 3D

{
  "theme": {
    "images": {
      "theme_frame": "Digitalrainbow5.jpg"
    },
    "colors": {
      "frame": "#0a0000",
      "tab_background_text": "#fcf6c0"
    }
  },
  "version": "2.0",
  "name": "Rainbow 3D",
  "manifest_version": 2,
  "description": "Computer art in rainbow colors."
}