Examine source code of Immortal gradient

{
  "theme": {
    "images": {
      "theme_frame": "personas_head.png"
    },
    "colors": {
      "frame": "#050505",
      "tab_background_text": "#7d7d7d"
    }
  },
  "version": "2.0",
  "name": "Immortal gradient",
  "manifest_version": 2,
  "description": "A simple Immortal black-dark red gradient with logo"
}