Examine source code of B&What Is This?

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#383838",
      "tab_background_text": "#fff5f5"
    }
  },
  "version": "2.0",
  "name": "B&What Is This?",
  "manifest_version": 2,
  "description": "I just wanted a theme I could read my tabs on, with a little twist. So I pulled up PhotoShop and bam!"
}