Examine source code of Heart Beat

{
  "theme": {
    "images": {
      "theme_frame": "heartbeat.JPG"
    },
    "colors": {
      "frame": "#c98536",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Heart Beat",
  "manifest_version": 2,
  "description": "A elegant yet simple beige with crimson heart edited by me into a persona. Apologies for the non high-quality image - any tips would be appreciated on this."
}