Examine source code of spring colors

{
  "theme": {
    "images": {
      "theme_frame": "20100518001.jpg"
    },
    "colors": {
      "frame": "#f5f113",
      "tab_background_text": "#121314"
    }
  },
  "version": "2.0",
  "name": "spring colors",
  "manifest_version": 2,
  "description": "spring colors in Montferland, Netherlands"
}