Examine source code of Simple Sand

{
  "theme": {
    "images": {
      "theme_frame": "sand.jpg"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#b2f7f6"
    }
  },
  "version": "2.0",
  "name": "Simple Sand",
  "manifest_version": 2,
  "description": "Each grain of sand makes the beach.\nEach moment in our day makes a lifetime."
}