Examine source code of Lego Heads

{
  "theme": {
    "images": {
      "theme_frame": "lego_header.jpg"
    },
    "colors": {
      "frame": "#d64f4f",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Lego Heads",
  "manifest_version": 2,
  "description": "This is a pattern design, using some of the classic Lego minifig heads for motifs. I am in no way affiliated with Lego."
}