Examine source code of Blue Steel

{
  "theme": {
    "images": {
      "theme_frame": "BlueSteelH.jpg"
    },
    "colors": {
      "frame": "#6f7d96",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Blue  Steel",
  "manifest_version": 2,
  "description": "blue, light, navy, abstract, glow, twilight, evening, Bokeh, simple, easy browser read, glisten, light, night,\n\nDesigned by MaDonna"
}