Examine source code of Underwater theme

{
  "theme": {
    "images": {
      "theme_frame": "topmuu.jpg"
    },
    "colors": {
      "frame": "#be8dd9",
      "tab_background_text": "#2c005e"
    }
  },
  "version": "2.0",
  "name": "Underwater theme",
  "manifest_version": 2,
  "description": "Cartoon-ish under water theme. "
}