Examine source code of Winter Scene

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#f7f4f4",
      "tab_background_text": "#737272"
    }
  },
  "version": "2.0",
  "name": "Winter Scene",
  "manifest_version": 2,
  "description": "A lovely restful winter theme with deer in the snow."
}