Examine source code of Devils colours

{
  "theme": {
    "images": {
      "theme_frame": "angel-devilbrowserhead.png"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Devils colours",
  "manifest_version": 2,
  "description": "A simple design I made. I am really good with photoshop, and since i saw this, I just had to make this."
}