Examine source code of Nouveau_Morris

{
  "theme": {
    "images": {
      "theme_frame": "Nouveau_morris_h.jpg"
    },
    "colors": {
      "frame": "#cccccc",
      "tab_background_text": "#333333"
    }
  },
  "version": "2.0",
  "name": "Nouveau_Morris",
  "manifest_version": 2,
  "description": "William Morris pattern"
}