Examine source code of Sinon

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#5b5c5b",
      "tab_background_text": "#b0eeff"
    }
  },
  "version": "2.0",
  "name": "Sinon",
  "manifest_version": 2,
  "description": "Simple theme:  Turquouse font. Kirito from season 1 and 3 of Sword Art online accompanied by Sinon from season 3.\n\nRate if you enjoy the theme.\n\n* For best fit enable 'Menu Bar' and disable 'Bookmarks Toolbar'\nCurrently no intention to fix the short bodies of Kirito when both toolbars are enabled."
}