Examine source code of SIMPLE NightSky

{
  "theme": {
    "images": {
      "theme_frame": "star_sky2_1280x800.png"
    },
    "colors": {
      "frame": "#0b001f",
      "tab_background_text": "#fffeba"
    }
  },
  "version": "2.0",
  "name": "SIMPLE NightSky",
  "manifest_version": 2,
  "description": "SIMPLE - Night Sky"
}