Examine source code of Spring Pastels

{
  "theme": {
    "images": {
      "theme_frame": "pastels.jpg"
    },
    "colors": {
      "frame": "#9999ee",
      "tab_background_text": "#333399"
    }
  },
  "version": "2.0",
  "name": "Spring Pastels",
  "manifest_version": 2,
  "description": "Spring, summer, pastels, abstract, flowers"
}