Examine source code of Stolen Heart_colour

{
  "theme": {
    "images": {
      "theme_frame": "P3colour.jpg"
    },
    "colors": {
      "frame": "rgba(229,230,232,1)",
      "tab_background_text": "#bac"
    }
  },
  "version": "2.0",
  "name": "Stolen Heart_colour",
  "manifest_version": 2,
  "description": "I downloaded a free vector graphic off the web, horizontally switched it, then carefully removed the background. I 'bevel and embossed' the image and added a colour background. Thank you to the unknown person who created the original, beautiful image in the first place."
}