Examine source code of Yellow Hearts

{
  "theme": {
    "images": {
      "theme_frame": "yellowhearts.PNG"
    },
    "colors": {
      "frame": "#080000",
      "tab_background_text": "#000408"
    }
  },
  "version": "2.0",
  "name": "Yellow Hearts",
  "manifest_version": 2,
  "description": "Yellow Hearts"
}