Examine source code of Blue scales

{
  "theme": {
    "images": {
      "theme_frame": "bluescales2.png"
    },
    "colors": {
      "frame": "#5a519e",
      "tab_background_text": "#08004f"
    }
  },
  "version": "2.0",
  "name": "Blue scales",
  "manifest_version": 2,
  "description": "Blue scales"
}