Examine source code of Grey black gradient

{
  "theme": {
    "images": {
      "theme_frame": "ffx1.png"
    },
    "colors": {
      "frame": "#5e5b5b",
      "tab_background_text": "#171702"
    }
  },
  "version": "2.0",
  "name": "Grey black gradient",
  "manifest_version": 2,
  "description": "Clean and fit for mac."
}