Examine source code of Irrlicht

{
  "theme": {
    "images": {
      "theme_frame": "Flamehead.jpg"
    },
    "colors": {
      "frame": "#1100ff",
      "tab_background_text": "#1100ff"
    }
  },
  "version": "2.0",
  "name": "Irrlicht",
  "manifest_version": 2,
  "description": "It's a Persona that show you a will-o'-the-wisp.\nI hope you'll like it."
}