Examine source code of Simple Sapphire

{
  "theme": {
    "images": {
      "theme_frame": "F1_Header.png"
    },
    "colors": {
      "frame": "#fafafa",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Simple Sapphire",
  "manifest_version": 2,
  "description": "My first try at a skin, had fun making it :)"
}