Examine source code of nice 256

{
  "theme": {
    "images": {
      "theme_frame": "46325_424912502476_533322476_5487897_2796176_n.jpg"
    },
    "colors": {
      "frame": "#ff8cbc",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "nice 256",
  "manifest_version": 2
}