Examine source code of Dark Blue/Black

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#071c47",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Dark Blue/Black",
  "manifest_version": 2,
  "description": "Just a simple dark blue theme easy on the eyes.\n\nbest to be used with (needs stylish) <a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/9cce4e63b0817322dc17bcac92d8a0693f4e6e38282e40f07aaa388139efba3c/https%3A//userstyles.org/styles/132001/dark-blue-transparent-for-firefox\">https://userstyles.org/styles/132001/dark-blue-transparent-for-firefox</a>"
}