Examine source code of Evening Wave

{
  "theme": {
    "images": {
      "theme_frame": "Evening_Wave_Header.jpg"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#f9fac0"
    }
  },
  "version": "2.0",
  "name": "Evening Wave",
  "manifest_version": 2,
  "description": "Beautiful evening wave against a spectacular sunset (image from a free desktop background site)"
}