Examine source code of night sky pentacle

{
  "theme": {
    "images": {
      "theme_frame": "night_sky_pentacle_header.jpg"
    },
    "colors": {
      "frame": "#b3b3b3",
      "tab_background_text": "#b5b5b5"
    }
  },
  "version": "2.0",
  "name": "night sky pentacle",
  "manifest_version": 2
}