Examine source code of Simple clean and dark

{
  "theme": {
    "images": {
      "theme_frame": "Persona_Header_TEMPLATE.jpg"
    },
    "colors": {
      "frame": "#ebebeb",
      "tab_background_text": "#bfbfbf"
    }
  },
  "version": "2.0",
  "name": "Simple clean and dark",
  "manifest_version": 2,
  "description": "A simple clean and dark persona"
}