Examine source code of Hot-2-Cold

{
  "theme": {
    "images": {
      "theme_frame": "personaheader.png"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Hot-2-Cold",
  "manifest_version": 2,
  "description": "A simple gradient that produces a lovely effect."
}