Examine source code of Subtle Spring

{
  "theme": {
    "images": {
      "theme_frame": "SubtleSpringHCustom.jpg"
    },
    "colors": {
      "frame": "#a5fefa",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Subtle Spring",
  "manifest_version": 2,
  "description": "aqua, cyan, blue, flowers, border, pattern, subtle, spring, summer, style, light, floral,"
}