Examine source code of catkins in spring

{
  "theme": {
    "images": {
      "theme_frame": "spring01_H.png"
    },
    "colors": {
      "frame": "#43bfbd",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "catkins in spring",
  "manifest_version": 2,
  "description": "pussy willow / catkins and a bright blue sky"
}