Examine source code of Simple Halloween Theme

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#ff6f00",
      "tab_background_text": "#e7e7e7"
    }
  },
  "version": "2.0",
  "name": "Simple Halloween Theme",
  "manifest_version": 2,
  "description": "A simple theme to get you in the halloween spirit!\nComplete with jack-o-lanterns and an orange gradient from the bottom to really get you into the halloween feel."
}