Examine source code of Red skulls

{
  "theme": {
    "images": {
      "theme_frame": "Redskulls.png"
    },
    "colors": {
      "frame": "#575757",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Red skulls",
  "manifest_version": 2,
  "description": "I made this in photoshop elements 5.0, however this pattern is not owned by me BUT i am able to use it."
}