Examine source code of Valentine Kitten

{
  "theme": {
    "images": {
      "theme_frame": "header231.jpg"
    },
    "colors": {
      "frame": "#c9c5c5",
      "tab_background_text": "#f7f2f2"
    }
  },
  "version": "2.0",
  "name": "Valentine Kitten",
  "manifest_version": 2,
  "description": "Valentines Day message."
}