Examine source code of Lindas Piano

{
  "theme": {
    "images": {
      "theme_frame": "MyPersonaWebtopper.jpg"
    },
    "colors": {
      "frame": "rgba(229,230,232,1)",
      "tab_background_text": "#010108"
    }
  },
  "version": "2.0",
  "name": "Lindas Piano",
  "manifest_version": 2,
  "description": "This is actually my piano. I just started learning last summer, at the age of 48! I love it!"
}