Examine source code of Deep_Blue_Bordered

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#3e3a91",
      "tab_background_text": "#DDD9D9"
    }
  },
  "version": "2.0",
  "name": "Deep_Blue_Bordered",
  "manifest_version": 2,
  "description": "Experimental, deep blue bordered them with light white text"
}