Examine source code of Mega Man NES 1

{
  "theme": {
    "images": {
      "theme_frame": "megaman_nes1_header.jpg"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#04c3e0"
    }
  },
  "version": "2.0",
  "name": "Mega Man NES 1",
  "manifest_version": 2,
  "description": "Nintendo NES Mega Man video games. megaman videogames"
}