Examine source code of Blue stars Background

{
  "theme": {
    "images": {
      "theme_frame": "Persona_stars.jpg"
    },
    "colors": {
      "frame": "#7f8ca0",
      "tab_background_text": "#fcfcfc"
    }
  },
  "version": "2.0",
  "name": "Blue stars Background",
  "manifest_version": 2,
  "description": "Beautiful stars background."
}