Examine source code of Gartic.io

{
  "name": "Gartic",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "IMG_24012020_193519_(3000_x_200_pixel).jpg"
    },
    "colors": {
      "frame": "rgba(9, 172, 253, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(16, 45, 97, 1)",
      "bookmark_text": "rgba(104, 97, 186, 1)"
    }
  }
}