Examine source code of Subtle Differences

{
  "theme": {
    "images": {
      "theme_frame": "1header.jpg"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Subtle Differences",
  "manifest_version": 2,
  "description": "A seemless pattern that I created and put to the test in photoshop.  Turned out great!  What do you think about it?"
}